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Question 1
Correct
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What is the recommended duration of antidepressant treatment for a patient who has experienced a single episode of depression?
Your Answer: For 6-9 months following complete remission
Explanation:Depression Treatment Duration
It is recommended to treat a single episode of depression for 6-9 months after complete remission. Abruptly stopping antidepressants after recovery can lead to a relapse in 50% of patients within 3-6 months. For patients who have experienced 2 of more depressive episodes in recent history, NICE recommends a minimum of 2 years of antidepressant treatment. These guidelines are outlined in the Maudsley Guidelines 10th Edition.
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This question is part of the following fields:
- General Adult Psychiatry
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Question 2
Incorrect
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Which route of administration is known to have the highest degree of first pass effect?
Your Answer: Intramuscular
Correct Answer: Oral
Explanation:The First Pass Effect in Psychiatric Drugs
The first-pass effect is a process in drug metabolism that significantly reduces the concentration of a drug before it reaches the systemic circulation. This phenomenon is related to the liver and gut wall, which absorb and metabolize the drug before it can enter the bloodstream. Psychiatric drugs are not exempt from this effect, and some undergo a significant reduction in concentration before reaching their target site. Examples of psychiatric drugs that undergo a significant first-pass effect include imipramine, fluphenazine, morphine, diazepam, and buprenorphine. On the other hand, some drugs undergo little to no first-pass effect, such as lithium and pregabalin.
Orally administered drugs are the most affected by the first-pass effect. However, there are other routes of administration that can avoid of partly avoid this effect. These include sublingual, rectal (partly avoids first pass), intravenous, intramuscular, transdermal, and inhalation. Understanding the first-pass effect is crucial in drug development and administration, especially in psychiatric drugs, where the concentration of the drug can significantly affect its efficacy and safety.
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This question is part of the following fields:
- Psychopharmacology
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Question 3
Correct
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Which medication is not recommended by NICE for individuals with panic disorder?
Your Answer: Diazepam
Explanation:Prescribing benzodiazepines for individuals with panic disorder is not recommended as it is linked to a poorer long-term outcome.
Anxiety (NICE guidelines)
The NICE Guidelines on Generalised anxiety disorder and panic disorder were issued in 2011. For the management of generalised anxiety disorder, NICE suggests a stepped approach. For mild GAD, education and active monitoring are recommended. If there is no response to step 1, low-intensity psychological interventions such as CBT-based self-help of psychoeducational groups are suggested. For those with marked functional impairment of those who have not responded to step 2, individual high-intensity psychological intervention of drug treatment is recommended. Specialist treatment is suggested for those with very marked functional impairment, no response to step 3, self-neglect, risks of self-harm or suicide, of significant comorbidity. Benzodiazepines should not be used beyond 2-4 weeks, and SSRIs are first line. For panic disorder, psychological therapy (CBT), medication, and self-help have all been shown to be effective. Benzodiazepines, sedating antihistamines, of antipsychotics should not be used. SSRIs are first line, and if they fail, imipramine of clomipramine can be used. Self-help (CBT based) should be encouraged. If the patient improves with an antidepressant, it should be continued for at least 6 months after the optimal dose is reached, after which the dose can be tapered. If there is no improvement after a 12-week course, an alternative medication of another form of therapy should be offered.
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This question is part of the following fields:
- General Adult Psychiatry
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Question 4
Correct
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Which of the following conditions does not exhibit a vertical transmission pattern?
Your Answer: Cystic fibrosis
Explanation:Autosomal dominant conditions exhibit vertical transmission, except for cystic fibrosis, which is a widely recognized autosomal recessive condition.
Modes of Inheritance
Genetic disorders can be passed down from one generation to the next in various ways. There are four main modes of inheritance: autosomal dominant, autosomal recessive, X-linked (sex-linked), and multifactorial.
Autosomal Dominant Inheritance
Autosomal dominant inheritance occurs when one faulty gene causes a problem despite the presence of a normal one. This type of inheritance shows vertical transmission, meaning it is based on the appearance of the family pedigree. If only one parent is affected, there is a 50% chance of each child expressing the condition. Autosomal dominant conditions often show pleiotropy, where a single gene influences several characteristics.
Autosomal Recessive Inheritance
In autosomal recessive conditions, a person requires two faulty copies of a gene to manifest a disease. A person with one healthy and one faulty gene will generally not manifest a disease and is labelled a carrier. Autosomal recessive conditions demonstrate horizontal transmission.
X-linked (Sex-linked) Inheritance
In X-linked conditions, the problem gene lies on the X chromosome. This means that all males are affected. Like autosomal conditions, they can be dominant of recessive. Affected males are unable to pass the condition on to their sons. In X-linked recessive conditions, the inheritance pattern is characterised by transmission from affected males to male grandchildren via affected carrier daughters.
Multifactorial Inheritance
Multifactorial conditions result from the interaction between genes from both parents and the environment.
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This question is part of the following fields:
- Genetics
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Question 5
Incorrect
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How would you rephrase the question Which of the following refers to the proportion of people scoring positive on a test that actually have the condition?
Your Answer: Negative predictive value
Correct Answer: Positive predictive value
Explanation:Clinical tests are used to determine the presence of absence of a disease of condition. To interpret test results, it is important to have a working knowledge of statistics used to describe them. Two by two tables are commonly used to calculate test statistics such as sensitivity and specificity. Sensitivity refers to the proportion of people with a condition that the test correctly identifies, while specificity refers to the proportion of people without a condition that the test correctly identifies. Accuracy tells us how closely a test measures to its true value, while predictive values help us understand the likelihood of having a disease based on a positive of negative test result. Likelihood ratios combine sensitivity and specificity into a single figure that can refine our estimation of the probability of a disease being present. Pre and post-test odds and probabilities can also be calculated to better understand the likelihood of having a disease before and after a test is carried out. Fagan’s nomogram is a useful tool for calculating post-test probabilities.
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This question is part of the following fields:
- Research Methods, Statistics, Critical Review And Evidence-Based Practice
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Question 6
Correct
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What is the most prevalent type of Down's syndrome?
Your Answer: Trisomy 21
Explanation:Down Syndrome: Causes and Risk Factors
Down syndrome is a genetic disorder caused by the presence of extra genetic material from chromosome 21. There are three different types of Down syndrome, each with its own cause and inheritance pattern. The most common form, full trisomy 21, is not inherited and accounts for 95% of cases. It occurs when there is a failure of chromosome 21 to separate properly during cell division, resulting in an extra copy of the chromosome. This can happen randomly, with the extra chromosome coming from the mother 88% of the time and from the father 12% of the time.
The second type, translocation Down syndrome, is inherited and accounts for 2-3% of cases. It occurs when a piece of chromosome 21 breaks off and attaches to another chromosome, resulting in extra genetic material. This type of Down syndrome is caused by a balanced translocation, which means that the parent carrying the translocation has no signs of symptoms of the disorder.
The third type, mosaic Down syndrome, is not inherited and also accounts for 2-3% of cases. It occurs as a random event during cell division early in fetal development, resulting in some cells having an extra copy of chromosome 21 while others do not.
The risk of having a child with Down syndrome increases as a mother gets older. At age 35, the risk is 1 in 385; at age 40, the risk is 1 in 106; and at age 45, the risk is 1 in 30. It is important for women to be aware of these risk factors and to discuss them with their healthcare provider if they are planning to have a child.
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This question is part of the following fields:
- Learning Disability
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Question 7
Correct
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What is the common street name for the illicit drug known as snow?
Your Answer: Cocaine
Explanation:Illicit drugs, also known as illegal drugs, are substances that are prohibited by law and can have harmful effects on the body and mind. Some of the most commonly used illicit drugs in the UK include opioids, amphetamines, cocaine, MDMA (ecstasy), cannabis, and hallucinogens.
Opioids, such as heroin, are highly addictive and can cause euphoria, drowsiness, constipation, and respiratory depression. Withdrawal symptoms may include piloerection, insomnia, restlessness, dilated pupils, yawning, sweating, and abdominal cramps.
Amphetamines and cocaine are stimulants that can increase energy, cause insomnia, hyperactivity, euphoria, and paranoia. Withdrawal symptoms may include hypersomnia, hyperphagia, depression, irritability, agitation, vivid dreams, and increased appetite.
MDMA, also known as ecstasy, can cause increased energy, sweating, jaw clenching, euphoria, enhanced sociability, and increased response to touch. Withdrawal symptoms may include depression, insomnia, depersonalisation, and derealisation.
Cannabis, also known as marijuana of weed, can cause relaxation, intensified sensory experience, paranoia, anxiety, and injected conjunctiva. Withdrawal symptoms may include insomnia, reduced appetite, and irritability.
Hallucinogens, such as LSD, can cause perceptual changes, pupillary dilation, tachycardia, sweating, palpitations, tremors, and incoordination. There is no recognised withdrawal syndrome for hallucinogens.
Ketamine, also known as Vitamin K, Super K, Special K, of donkey dust, can cause euphoria, dissociation, ataxia, and hallucinations. There is no recognised withdrawal syndrome for ketamine.
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This question is part of the following fields:
- Substance Misuse/Addictions
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Question 8
Incorrect
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Regarding the pharmacokinetics of psychotropic drugs, which statement is accurate?
Your Answer: Paroxetine induces its own biotransformation
Correct Answer: Carbamazepine induces its own biotransformation
Explanation:Enzyme induction can accelerate drug metabolism and increase the risk of inadequate treatment. This process is often triggered by drugs such as ethanol, rifampin, barbiturates (e.g. phenobarbital, primidone), phenytoin, and carbamazepine. Carbamazepine, for instance, induces its own metabolism through cytochrome P450 enzymes 3A4 and 2E1. Typically, enzyme induction boosts glucuronyl transferase activity, which enhances drug conjugation.
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This question is part of the following fields:
- Psychopharmacology
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Question 9
Incorrect
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Which medications have the potential to reduce the contraceptive effect of oral contraceptives?
Your Answer: Amitriptyline
Correct Answer: St John's Wort
Explanation:Out of the given options, only St John’s Wort is explicitly stated in the interactions section of the BNF as causing a decrease in contraceptive effectiveness. While tricyclic antidepressants are also mentioned, the BNF notes that their impact may be on the effectiveness of the antidepressant rather than the contraceptive.
Interactions with Oral Contraceptives
Psychiatric drugs such as St John’s Wort, Carbamazepine, Phenytoin, Topiramate, and Barbiturates can interact with oral contraceptives and lead to a reduced contraceptive effect. It is important to be aware of these potential interactions to ensure the effectiveness of oral contraceptives.
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This question is part of the following fields:
- Psychopharmacology
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Question 10
Incorrect
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A 50-year-old female with a history of bipolar disorder presents with an acute confusional state.
Which one of the following drugs is most likely to precipitate lithium toxicity?Your Answer: Atenolol
Correct Answer: Bendroflumethiazide
Explanation:Plasma concentrations of lithium may be decreased by both sodium bicarbonate and aminophylline.
Lithium – Pharmacology
Pharmacokinetics:
Lithium salts are rapidly absorbed following oral administration and are almost exclusively excreted by the kidneys unchanged. Blood samples for lithium should be taken 12 hours post-dose.Ebstein’s:
Ebstein’s anomaly is a congenital malformation consisting of a prolapse of the tricuspid valve into the right ventricle. It occurs in 1:20,000 of the general population. Initial data suggested it was more common in those using lithium but this had not held to be true.Contraindications:
Addison’s disease, Brugada syndrome, cardiac disease associated with rhythm disorders, clinically significant renal impairment, untreated of untreatable hypothyroidism, low sodium levels.Side-effects:
Common side effects include nausea, tremor, polyuria/polydipsia, rash/dermatitis, blurred vision, dizziness, decreased appetite, drowsiness, metallic taste, and diarrhea. Side-effects are often dose-related.Long-term use is associated with hypothyroidism, hyperthyroidism, hypercalcemia/hyperparathyroidism, irreversible nephrogenic diabetes insipidus, and reduced GFR.
Lithium-induced diabetes insipidus:
Treatment options include stopping lithium (if feasible), keeping levels within 0.4-0.8 mmol/L, once-daily dose of the drug taken at bedtime, amiloride, thiazide diuretics, indomethacin, and desmopressin.Toxicity:
Lithium salts have a narrow therapeutic/toxic ratio. Risk factors for lithium toxicity include drugs altering renal function, decreased circulating volume, infections, fever, decreased oral intake of water, renal insufficiency, and nephrogenic diabetes insipidus. Features of lithium toxicity include GI symptoms and neuro symptoms.Pre-prescribing:
Before prescribing lithium, renal function, cardiac function, thyroid function, FBC, and BMI should be checked. Women of childbearing age should be advised regarding contraception, and information about toxicity should be provided.Monitoring:
Lithium blood levels should be checked weekly until stable, and then every 3-6 months once stable. Thyroid and renal function should be checked every 6 months. Patients should be issued with an information booklet, alert card, and record book. -
This question is part of the following fields:
- Psychopharmacology
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Question 11
Correct
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If a 12 year old with moderate depression has not responded to psychological therapy, what treatment is recommended?
Your Answer: Fluoxetine
Explanation:Depression in Children and Adolescents
The first line of treatment for depression in children and adolescents is psychological therapy. If this approach is unsuccessful, fluoxetine is the preferred treatment. If fluoxetine is also ineffective, an alternative SSRI should be considered. However, there is limited data on which SSRI is most appropriate. These recommendations are based on the Maudsley Guidelines 10th Edition.
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This question is part of the following fields:
- Child And Adolescent Psychiatry
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Question 12
Incorrect
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What is a true statement about the planum temporale?
Your Answer: Planum temporale asymmetry is often pronounced in dyslexia
Correct Answer: Planum temporale asymmetry is more prominent in males than in females
Explanation:Cerebral Asymmetry in Planum Temporale and its Implications in Language and Auditory Processing
The planum temporale, a triangular region in the posterior superior temporal gyrus, is a highly lateralized brain structure involved in language and music processing. Studies have shown that the planum temporale is up to ten times larger in the left cerebral hemisphere than the right, with this asymmetry being more prominent in men. This asymmetry can be observed in gestation and is present in up to 70% of right-handed individuals.
Recent research suggests that the planum temporale also plays an important role in auditory processing, specifically in representing the location of sounds in space. However, reduced planum temporale asymmetry has been observed in individuals with dyslexia, stuttering, and schizophrenia. These findings highlight the importance of cerebral asymmetry in the planum temporale and its implications in language and auditory processing.
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This question is part of the following fields:
- Neurosciences
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Question 13
Correct
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The Camberwell Family Interview assesses mainly which of the following?
Your Answer: Expressed emotion
Explanation:The Camberwell Family Interview for Measuring Expressed Emotion
The Camberwell Family Interview is a tool designed to assess the level of expressed emotion within families. This interview was created with the aim of identifying the emotional climate within a family, particularly in relation to individuals with mental health issues. The interview is structured and standardized, with a set of questions that are asked to each family member separately. The questions are designed to elicit information about the family’s emotional atmosphere, including levels of criticism, hostility, and emotional over-involvement.
The Camberwell Family Interview is a valuable tool for mental health professionals, as it can help them to identify families that may be at risk of exacerbating mental health issues in their loved ones. By measuring expressed emotion, mental health professionals can gain insight into the family’s emotional dynamics and work with them to create a more supportive and positive environment. The interview can also be used to track changes in the family’s emotional climate over time, allowing mental health professionals to monitor progress and adjust treatment plans accordingly. Overall, the Camberwell Family Interview is an important tool for understanding and addressing the emotional needs of families affected by mental health issues.
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This question is part of the following fields:
- Child And Adolescent Psychiatry
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Question 14
Incorrect
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A 28-year-old man with a recent onset of seizures and a family history of epilepsy is referred for an EEG. He is currently taking oral carbamazepine. His EEG reveals mild diffuse instability.
What is the most probable cause for this EEG finding?Your Answer: Creutzfeldt-Jakob disease
Correct Answer: Antipsychotic medication
Explanation:EEG waveforms may be slightly disrupted by antipsychotic medication, while sporadic Creutzfeldt-Jakob disease (CJD) is linked to specific periodic sharp wave complexes (PSWC) during the middle and late stages of the illness. Generalized seizures would exhibit more pronounced irregularities, whereas temporal lobe epilepsy (TLE) would display anomalous activity originating from a single temporal lobe.
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This question is part of the following fields:
- Description And Measurement
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Question 15
Correct
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A 68-year-old woman is experiencing changes in her personality and difficulty remembering things. What cognitive assessment would be suitable for evaluating her frontal lobe function?
Your Answer: Wisconsin card sorting test
Explanation:The WCST is a test that assesses frontal lobe function by presenting the patient with cards that vary in shape, color, and number. The patient is asked to sort the cards based on one of these dimensions and then switch to another dimension. Patients with frontal lobe damage may struggle with inflexible thinking and inhibiting previously correct answers.
The Benton visual retention test is a test of visual memory that does not assess frontal lobe function. The patient is shown geometric shapes for ten seconds and then asked to draw them from memory.
The NART is a test that measures premorbid IQ.
The Rorschach inkblot test is a projective personality test.
The Rey-Osterrieth complex figure test assesses visuospatial skills. The patient is asked to copy a complex figure and then reproduce it from memory.
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This question is part of the following fields:
- Assessment
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Question 16
Correct
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In which region of the brain are most dopamine neurons found?
Your Answer: Substantia nigra
Explanation:Neurotransmitters are substances used by neurons to communicate with each other and with target tissues. They are synthesized and released from nerve endings into the synaptic cleft, where they bind to receptor proteins in the cellular membrane of the target tissue. Neurotransmitters can be classified into different types, including small molecules (such as acetylcholine, dopamine, norepinephrine, serotonin, and GABA) and large molecules (such as neuropeptides). They can also be classified as excitatory or inhibitory. Receptors can be ionotropic or metabotropic, and the effects of neurotransmitters can be fast of slow. Some important neurotransmitters include acetylcholine, dopamine, GABA, norepinephrine, and serotonin. Each neurotransmitter has a specific synthesis, breakdown, and receptor type. Understanding neurotransmitters is important for understanding the function of the nervous system and for developing treatments for neurological and psychiatric disorders.
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This question is part of the following fields:
- Neurosciences
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Question 17
Correct
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What is a true statement about Turner syndrome?
Your Answer: It only affects females
Explanation:The majority of Turner syndrome cases are not inherited and occur due to a failure in the separation of chromosomes during cell division, known as nondisjunction.
Understanding Turner Syndrome
Turner syndrome is a genetic disorder that affects only females. It occurs when one of the two X chromosomes is missing of partially missing. This happens randomly and does not increase the risk of the condition in future siblings. Although X-inactivation occurs in females, having only one X chromosome can cause issues as not all genes are inactivated in the inactivated X chromosome.
The features of Turner syndrome include short stature, a webbed neck, a broad chest with widely spaced nipples, gonadal dysfunction leading to amenorrhea and infertility, congenital heart disease, and hypothyroidism. Despite these physical characteristics, girls with Turner syndrome typically have normal intelligence, with a mean full-scale IQ of 90. However, they may struggle with nonverbal, social, and psychomotor skills. It is important to understand the symptoms and effects of Turner syndrome to provide appropriate care and support for affected individuals.
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This question is part of the following fields:
- Psychological Development
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Question 18
Incorrect
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What is the closest estimate of the lifetime prevalence of schizophrenia in England?
Your Answer: 5%
Correct Answer: 0.60%
Explanation:Schizophrenia Epidemiology
Prevalence:
– In England, the estimated annual prevalence for psychotic disorders (mostly schizophrenia) is around 0.4%.
– Internationally, the estimated annual prevalence for psychotic disorders is around 0.33%.
– The estimated lifetime prevalence for psychotic disorders in England is approximately 0.63% at age 43, consistent with the typically reported 1% prevalence over the life course.
– Internationally, the estimated lifetime prevalence for psychotic disorders is around 0.48%.Incidence:
– In England, the pooled incidence rate for non-affective psychosis (mostly schizophrenia) is estimated to be 15.2 per 100,000 years.
– Internationally, the incidence of schizophrenia is about 0.20/1000/year.Gender:
– The male to female ratio is 1:1.Course and Prognosis:
– Long-term follow-up studies suggest that after 5 years of illness, one quarter of people with schizophrenia recover completely, and for most people, the condition gradually improves over their lifetime.
– Schizophrenia has a worse prognosis with onset in childhood of adolescence than with onset in adult life.
– Younger age of onset predicts a worse outcome.
– Failure to comply with treatment is a strong predictor of relapse.
– Over a 2-year period, one-third of patients with schizophrenia showed a benign course, and two-thirds either relapsed of failed to recover.
– People with schizophrenia have a 2-3 fold increased risk of premature death.Winter Births:
– Winter births are associated with an increased risk of schizophrenia.Urbanicity:
– There is a higher incidence of schizophrenia associated with urbanicity.Migration:
– There is a higher incidence of schizophrenia associated with migration.Class:
– There is a higher prevalence of schizophrenia among lower socioeconomic classes.Learning Disability:
– Prevalence rates for schizophrenia in people with learning disabilities are approximately three times greater than for the general population. -
This question is part of the following fields:
- General Adult Psychiatry
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Question 19
Incorrect
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A young psychologist is interested in studying different types of anxiety disorders. They are looking for a classification system that can be used in both clinical and research settings.
What is the most suitable classification system for the psychologist to use?Your Answer: ICD-11
Correct Answer: DSM IV
Explanation:The DSM IV is a single version used for both clinical and research purposes, and it includes subtypes of schizophrenia that have been removed from the newer DSM-5. The DSM IV TR is a revised version of the DSM IV, published by the American Psychiatric Association. However, the DSM-5, published in 2013, supersedes both versions and includes changes such as dropping Asperger syndrome as a distinct classification and revising the treatment of gender identity issues. The ICD-10, on the other hand, is a medical classification list by the World Health Organization that codes for diseases, signs and symptoms, abnormal findings, complaints, social circumstances, and external causes of injury of diseases. The WHO is currently revising the ICD towards the ICD-11, which is expected to be submitted for official endorsement by 2015.
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This question is part of the following fields:
- Description And Measurement
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Question 20
Incorrect
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What was the degree of increase in the incidence of schizophrenia among Afro-Caribbeans in the AESOP study?
Your Answer: 5
Correct Answer: 9
Explanation:The AESOP study is a first-presentation study of schizophrenia and other psychotic disorders that identified all people presenting to services with psychotic symptoms in well-defined catchment areas in South London, Nottingham and Bristol. The study aimed to elucidate the overall rates of psychotic disorder in the 3 centres, confirm and extend previous findings of raised rates of psychosis in certain migrant groups in the UK, and explore in detail the biological and social risk factors in these populations and their possible interactions. The study found that the incidence of all psychoses was higher in African-Caribbean and Black African populations, particularly in schizophrenia and manic psychosis. These groups were also more likely to be compulsorily admitted to hospital and come to the attention of mental health services via police of other criminal justice agencies, and less likely to come via the GP.
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This question is part of the following fields:
- General Adult Psychiatry
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Question 21
Correct
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A 45-year-old man presents with a high fever of 39.5°C. He reports a stiff neck and complains of a severe headache. He quickly becomes confused and there is evidence that he is experiencing hallucinations related to taste and smell.
He has a history of being in good health, but had a pacemaker implanted at the age of 30. He has not traveled outside of the country recently. The medical team has requested your assistance as the consulting psychiatrist.
What is the most probable diagnosis?Your Answer: Herpes simplex virus (HSV) encephalitis
Explanation:The patient’s symptoms indicate possible HSV encephalitis, with specific damage to the temporal and orbitofrontal regions causing hallucinations, loss of smell, and significant memory problems. Immediate treatment with acyclovir and dexamethasone is necessary, and referral for decompression may be necessary depending on the severity of the condition.
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This question is part of the following fields:
- General Adult Psychiatry
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Question 22
Incorrect
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How can the pre-test probability be expressed in another way?
Your Answer: The incidence of a condition
Correct Answer: The prevalence of a condition
Explanation:The prevalence refers to the percentage of individuals in a population who currently have a particular condition, while the incidence is the frequency at which new cases of the condition arise within a specific timeframe.
Clinical tests are used to determine the presence of absence of a disease of condition. To interpret test results, it is important to have a working knowledge of statistics used to describe them. Two by two tables are commonly used to calculate test statistics such as sensitivity and specificity. Sensitivity refers to the proportion of people with a condition that the test correctly identifies, while specificity refers to the proportion of people without a condition that the test correctly identifies. Accuracy tells us how closely a test measures to its true value, while predictive values help us understand the likelihood of having a disease based on a positive of negative test result. Likelihood ratios combine sensitivity and specificity into a single figure that can refine our estimation of the probability of a disease being present. Pre and post-test odds and probabilities can also be calculated to better understand the likelihood of having a disease before and after a test is carried out. Fagan’s nomogram is a useful tool for calculating post-test probabilities.
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This question is part of the following fields:
- Research Methods, Statistics, Critical Review And Evidence-Based Practice
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Question 23
Correct
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What is the relationship between cannabis use and the likelihood of developing schizophrenia?
Your Answer: The younger a person starts using cannabis the higher their subsequent risk
Explanation:Consistent evidence suggests a link between cannabis use and schizophrenia risk, with the risk increasing as the age of first use decreases.
Schizophrenia and Cannabis Use
The relationship between cannabis use and the risk of developing schizophrenia is a topic of ongoing debate. However, research suggests that cannabis use may increase the risk of later schizophrenia of schizophreniform disorder by two-fold (Arseneault, 2004). The risk of developing schizophrenia appears to be higher in individuals who start using cannabis at a younger age. For instance, regular cannabis smokers at the age of 15 are 4.5 times more likely to develop schizophrenia at the age of 26, compared to those who did not report regular use until age 18 (Murray, 2004).
A systematic review published in the Lancet in 2007 found that the lifetime risk of developing psychosis increased by 40% in individuals who had ever used cannabis (Moore, 2007). Another meta-analysis reported that the age at onset of psychosis was 2.70 years younger in cannabis users than in non-users (Large, 2011). These findings suggest that cannabis use may have a significant impact on the development of schizophrenia and related disorders.
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This question is part of the following fields:
- Substance Misuse/Addictions
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Question 24
Incorrect
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Which outcome is most likely to result from the use of interferon α?
Your Answer: Priapism
Correct Answer: Depression
Explanation:Prescribing in the Elderly: Iatrogenic Consequences
Many medications, both prescribed and over-the-counter, can have significant adverse effects in the elderly population. It is important to note that the lists provided below are not exhaustive, and only the most common and important examples are given.
Medications Linked to Delirium and Other Cognitive Disorders
Medications are the most common reversible cause of delirium and dementia in the elderly. Many medications can cause cognitive impairment, but the classes of drugs most strongly associated with the development of drug-induced dementia are opioids, benzodiazepines, and anticholinergics.
According to a systematic review done in 2011 (Clegg, 2011), long-acting benzodiazepines (e.g., diazepam) are more troublesome than those that are shorter-acting. Opioids are associated with an approximately 2-fold increased risk of delirium in medical and surgical patients (Clegg, 2011). Pethidine appears to have a higher risk of delirium compared with other members of the opioid class. This may be because pethidine can accumulate when renal function is impaired and is converted to a metabolite with anticholinergic properties.
Some antipsychotic drugs have considerable antimuscarinic (anticholinergic) activity (e.g., chlorpromazine and clozapine), which may cause of worsen delirium. Delirium is uncommon in newer antipsychotics (but has been reported).
Medications Linked to Mood Changes
The following medications are well known to precipitate mood changes:
– Centrally-acting antihypertensives (e.g., methyldopa, reserpine, and clonidine) can cause depressive symptoms.
– Interferon-a is capable of inducing depressive symptoms.
– Digoxin is capable of inducing depressive symptoms.
– Corticosteroids can cause depressive, manic, and mixed symptoms with of without psychosis.
– Antidepressants can precipitate mania.Medications Linked to Psychosis
The following medications are well known to precipitate psychosis:
– Anti-Parkinson’s Medications (e.g., bromocriptine, amantadine, selegiline, anticholinergics (e.g., trihexyphenidyl, benztropine, benzhexol), and levodopa).
– CorticosteroidsMedications Linked to Anxiety
The following medications are well known to precipitate anxiety:
– Stimulants
– β adrenergic inhalers -
This question is part of the following fields:
- Psychopharmacology
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Question 25
Correct
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What is the main focus of behavioural activation therapy?
Your Answer: Depression
Explanation:Understanding Behavioural Activation Therapy for Depression
Behavioural activation therapy is a formal treatment for depression that emphasizes activity scheduling to encourage patients to approach activities they are avoiding. Unlike traditional cognitive therapy, it involves less cognitive therapy and is easier to train staff in its use. The therapy was introduced by Martell in 2001 and has two primary focuses: the use of avoided activities as a guide for activity scheduling and functional analysis of cognitive processes that involve avoidance.
Behavioural activation theory suggests that when people become depressed, many of their activities function as avoidance and escape from aversive thoughts, feelings, of external situations. As a result, someone with depression engages less frequently in pleasant of satisfying activities and obtains less positive reinforcement than someone without depression. To address this, the patient is encouraged to identify activities and problems that they avoid and to establish valued directions to be followed. These are set out on planned timetables (activity schedules).
In behavioural activation therapy, therapists do not engage in the content of the patient’s thinking. Instead, they use functional analysis to focus on the context and process of the individual’s response. The most common cognitive responses are rumination, fusion, and self-attack. A typical session has a structured agenda to review homework and progress towards goals, discuss feedback on the previous session, and focus on one of two specific issues. The number of sessions required to treat depression is typically between 12 and 24.
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This question is part of the following fields:
- Psychotherapy
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Question 26
Incorrect
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According to Klerman's bipolar subtypes, which of the following refers to hypomania of mania precipitated by antidepressant drugs?
Your Answer: Bipolar III
Correct Answer: Bipolar IV
Explanation:Bipolar Disorder: Historical Subtypes
Bipolar disorder is a complex mental illness that has been classified into several subtypes over the years. The most widely recognized subtypes are Bipolar I, Bipolar II, and Cyclothymia. However, there have been other classification systems proposed by experts in the field.
In 1981, Gerald Klerman proposed a classification system that included Bipolar I, Bipolar II, Bipolar III, Bipolar IV, Bipolar V, and Bipolar VI. This system was later expanded by Akiskal in 1999, who added more subtypes such as Bipolar I 1/2, Bipolar II 1/2, and Bipolar III 1/2.
Bipolar I is characterized by full-blown mania, while Bipolar II is characterized by hypomania with depression. Cyclothymia is a milder form of bipolar disorder that involves cycling between hypomania and mild depression.
Other subtypes include Bipolar III, which is associated with hypomania of mania precipitated by antidepressant drugs, and Bipolar IV, which is characterized by hyperthymic depression. Bipolar V is associated with depressed patients who have a family history of bipolar illness, while Bipolar VI is characterized by mania without depression (unipolar mania).
Overall, the classification of bipolar disorder subtypes has evolved over time, and different experts have proposed different systems. However, the most widely recognized subtypes are still Bipolar I, Bipolar II, and Cyclothymia.
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This question is part of the following fields:
- General Adult Psychiatry
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Question 27
Incorrect
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From which gland is melatonin secreted?
Your Answer: Pituitary
Correct Answer: Pineal
Explanation:The pineal gland secretes melatonin, while the adrenal glands secrete cortisol, aldosterone, adrenaline, and noradrenaline. The release of pituitary hormones is regulated by the hypothalamus, which synthesizes and secretes releasing hormones. Additionally, the parathyroid glands secrete parathyroid hormone (PTH).
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This question is part of the following fields:
- Neurosciences
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Question 28
Incorrect
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What neuropathological evidence would provide the strongest support for a diagnosis of chronic traumatic encephalopathy?
Your Answer: Increased pigmentation of the substantia nigra
Correct Answer: Tau accumulations, predominantly around small intracortical blood vessels
Explanation:Dementia Pugilistica: A Neurodegenerative Condition Resulting from Neurotrauma
Dementia pugilistica, also known as chronic traumatic encephalopathy (CTE), is a neurodegenerative condition that results from neurotrauma. It is commonly seen in boxers and NFL players, but can also occur in anyone with neurotrauma. The condition is characterized by symptoms such as gait ataxia, slurred speech, impaired hearing, tremors, disequilibrium, neurobehavioral disturbances, and progressive cognitive decline.
Most cases of dementia pugilistica present with early onset cognitive deficits, and behavioral signs exhibited by patients include aggression, suspiciousness, paranoia, childishness, hypersexuality, depression, and restlessness. The progression of the condition leads to more prominent behavioral symptoms such as difficulty with impulse control, irritability, inappropriateness, and explosive outbursts of aggression.
Neuropathological abnormalities have been identified in CTE, with the most unique feature being the abnormal accumulation of tau in neurons and glia in an irregular, focal, perivascular distribution and at the depths of cortical sulci. Abnormalities of the septum pellucidum, such as cavum and fenestration, are also a common feature.
While the condition has become increasingly rare due to the progressive improvement in sports safety, it is important to recognize the potential long-term consequences of repeated head injuries and take steps to prevent them.
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This question is part of the following fields:
- Neurosciences
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Question 29
Incorrect
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A 60-year-old female with a long history of bipolar disorder is being discharged from the hospital in a week. During her capacity assessment, she stated that she understood her finances and what she planned to do with them. She mentioned that she wanted to invest some of her money in a high-risk stock, which could potentially result in financial loss. However, she believed that the company's new product would be successful and yield a return on her investment. These thoughts are not related to her mental illness. Based on this information, what can be said about her capacity to manage her finances?
Your Answer: He does not have capacity
Correct Answer: He has capacity for managing his finances
Explanation:The capacity of an individual to make decisions is specific to the decision being made and can change over time. The Mental Capacity Act 2005 aims to protect and empower those who may lack capacity to make certain decisions. The Act is based on five key principles, including the assumption that every adult has the right to make their own decisions unless proven otherwise, the provision of practical help before assuming lack of capacity, and the importance of making decisions in the best interests of the individual. Additionally, any actions taken on behalf of someone lacking capacity should be the least restrictive of their basic rights and freedoms. It is important to note that an unwise decision does not necessarily indicate a lack of capacity.
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This question is part of the following fields:
- Basic Ethics And Philosophy Of Psychiatry
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Question 30
Incorrect
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What term is used to describe an association between two variables that is influenced by a confounding factor?
Your Answer: Partial
Correct Answer: Indirect
Explanation:Stats Association and Causation
When two variables are found to be more commonly present together, they are said to be associated. However, this association can be of three types: spurious, indirect, of direct. Spurious association is one that has arisen by chance and is not real, while indirect association is due to the presence of another factor, known as a confounding variable. Direct association, on the other hand, is a true association not linked by a third variable.
Once an association has been established, the next question is whether it is causal. To determine causation, the Bradford Hill Causal Criteria are used. These criteria include strength, temporality, specificity, coherence, and consistency. The stronger the association, the more likely it is to be truly causal. Temporality refers to whether the exposure precedes the outcome. Specificity asks whether the suspected cause is associated with a specific outcome of disease. Coherence refers to whether the association fits with other biological knowledge. Finally, consistency asks whether the same association is found in many studies.
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This question is part of the following fields:
- Research Methods, Statistics, Critical Review And Evidence-Based Practice
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Question 31
Correct
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A 30-year-old third generation African American female has just been diagnosed with schizophrenia. Her family is curious about what may have caused her condition. What is the most likely explanation for her schizophrenia?
Your Answer: Migrant workers from certain ethnic minority groups experience increased rates of schizophrenia in the UK
Explanation:Studies have consistently shown that migrant populations have higher rates of schizophrenia, particularly among certain minority ethnic groups. The NICE guidelines on schizophrenia (CG178) have highlighted the importance of investigating social and environmental factors that may increase the risk of developing the illness, such as urban birth and rearing, social adversity and trauma, heavy cannabis use, migration, and stressful life events. Schizophrenia is the most common form of psychotic disorder, with a mean incidence of 0.11 per 1000 (range 0.07-0.17 per 1000) reported in epidemiological studies. The average rates for men and women are similar, but the age of onset is typically 5 years later in women, resulting in a lower female rate during adolescence and a second smaller peak after menopause. The lifetime prevalence of schizophrenia ranges from 0.4 to 1.4%, and a UK survey found a population prevalence of probable psychotic disorder of 5 per 1000 in the age group of 16 to 74 years.
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This question is part of the following fields:
- Stigma And Culture
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Question 32
Incorrect
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A client in their 50s taking risperidone reports an atypical feeling during ejaculation and absence of semen. Which receptor is responsible for this side effect due to the medication's antagonism?
Your Answer: Cholinergic
Correct Answer: Adrenergic
Explanation:Antipsychotic medications change the tension of the bladder of urethral sphincter, which can result in the backward flow of semen into the bladder during ejaculation. This effect is believed to be caused by blocking the 1-adrenergic receptor.
Antipsychotics: Common Side Effects and Relative Adverse Effects
Antipsychotics are medications used to treat various mental health conditions, including schizophrenia and bipolar disorder. However, they can also cause side effects that can be bothersome of even serious. The most common side effects of antipsychotics are listed in the table below, which includes the adverse effects associated with their receptor activity.
Antidopaminergic effects: These effects are related to the medication’s ability to block dopamine receptors in the brain. They can cause galactorrhoea, gynecomastia, menstrual disturbance, lowered sperm count, reduced libido, Parkinsonism, dystonia, akathisia, and tardive dyskinesia.
Anticholinergic effects: These effects are related to the medication’s ability to block acetylcholine receptors in the brain. They can cause dry mouth, blurred vision, urinary retention, and constipation.
Antiadrenergic effects: These effects are related to the medication’s ability to block adrenaline receptors in the body. They can cause postural hypotension and ejaculatory failure.
Histaminergic effects: These effects are related to the medication’s ability to block histamine receptors in the brain. They can cause drowsiness.
The Maudsley Guidelines provide a rough guide to the relative adverse effects of different antipsychotics. The table below summarizes their findings, with +++ indicating a high incidence of adverse effects, ++ indicating a moderate incidence, + indicating a low incidence, and – indicating a very low incidence.
Drug Sedation Weight gain Diabetes EPSE Anticholinergic Postural Hypotension Prolactin elevation
Amisulpride – + + + – – +++
Aripiprazole – +/- – +/- – – –
Asenapine + + +/- +/- – – +/-
Clozapine +++ +++ +++ – +++ +++ –
Flupentixol + ++ + ++ ++ + +++
Fluphenazine + + + +++ ++ + +++
Haloperidol + + +/- +++ + + +++
Olanzapine ++ +++ +++ +/- + + +
Paliperidone + ++ + + + ++ +++
Pimozide + + – + + + +++
Quetiapine ++ ++ ++ – + ++ –
Risperidone + ++ + + + ++ +++
Zuclopenthixol ++ ++ + ++ ++ + +++Overall, it is important to discuss the potential side effects of antipsychotics with a healthcare provider and to monitor for any adverse effects while taking these medications.
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This question is part of the following fields:
- Psychopharmacology
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Question 33
Correct
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What is the most frequently observed psychiatric disorder in children with PANDAS?
Your Answer: Obsessive compulsive disorder
Explanation:PANDAS: Paediatric Autoimmune Neuropsychiatric Disorders Associated with Streptococcal Infections
PANDAS is a condition characterized by sudden onset of worsening of obsessive compulsive disorder (OCD) and tic disorders in children between the ages of 3 and puberty. It is associated with group A beta-hemolytic streptococcal infection, which can be confirmed through a positive throat culture of history of scarlet fever. In addition to psychiatric symptoms, PANDAS is also associated with neurological abnormalities such as physical hyperactivity and jerky movements that are not under the child’s control. The presence of these diagnostic features can help identify PANDAS in affected children.
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This question is part of the following fields:
- Child And Adolescent Psychiatry
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Question 34
Incorrect
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What is the scale commonly utilized in pharmaceutical research to evaluate extrapyramidal side effects?
Your Answer: Conors
Correct Answer: AIMS
Explanation:Assessment tools are commonly used in clinical research to diagnose and evaluate various conditions. The abnormal involuntary movement scale (AIMS) is one such tool that assesses the range of extrapyramidal side effects caused by neuroleptic medication. Another tool, Conors, is used to diagnose ADHD in children, while DIVA is used for the same purpose in adults. DISCO, on the other hand, is an assessment tool used to diagnose ASD at any age. Finally, the Hamilton depression rating scale, also known as HAM D-17, is used to evaluate the severity of depression in patients. Proper use of these assessment tools can aid in accurate diagnosis and effective treatment of various conditions.
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This question is part of the following fields:
- Description And Measurement
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Question 35
Incorrect
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Which value of r indicates the highest degree of correlation?
Your Answer: 0.77
Correct Answer: -0.8
Explanation:It is important to distinguish between the direction of the correlation (the slope of the line) and its strength (the spread of the data). To emphasize this difference, the correct answer to this question is a negative value.
Stats: Correlation and Regression
Correlation and regression are related but not interchangeable terms. Correlation is used to test for association between variables, while regression is used to predict values of dependent variables from independent variables. Correlation can be linear, non-linear, of non-existent, and can be strong, moderate, of weak. The strength of a linear relationship is measured by the correlation coefficient, which can be positive of negative and ranges from very weak to very strong. However, the interpretation of a correlation coefficient depends on the context and purposes. Correlation can suggest association but cannot prove of disprove causation. Linear regression, on the other hand, can be used to predict how much one variable changes when a second variable is changed. Scatter graphs are used in correlation and regression analyses to visually determine if variables are associated and to detect outliers. When constructing a scatter graph, the dependent variable is typically placed on the vertical axis and the independent variable on the horizontal axis.
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This question is part of the following fields:
- Research Methods, Statistics, Critical Review And Evidence-Based Practice
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Question 36
Incorrect
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A senior citizen who has been on diazepam for a number of years has recently been encouraged to stop them. You see them in clinic soon after they have started a reduction regime and they complain of a number of problems. Which of the following symptoms would most likely be related to them reducing their diazepam?:
Your Answer: Constipation
Correct Answer: Weakness
Explanation:Benzodiazepines and Addiction
Benzodiazepines are known to be addictive and should only be prescribed as a hypnotic or anxiolytic for a maximum of 4 weeks. Withdrawal symptoms can be physical of psychological, including stiffness, weakness, GI disturbance, paraesthesia, flu-like symptoms, visual disturbance, anxiety, insomnia, nightmares, depersonalisation, decreased memory and concentration, delusions, and hallucinations. Patients who wish to withdraw from short-acting benzodiazepines should first be converted to diazepam, which has a longer half-life and produces less severe withdrawal. The table provides approximate equivalent doses for different benzodiazepines. These guidelines are from the Maudsley Guidelines 10th Edition.
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This question is part of the following fields:
- Substance Misuse/Addictions
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Question 37
Incorrect
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What type of adverse drug reaction is typically associated with blood abnormalities like neutropenia?
Your Answer: Type III
Correct Answer: Type II
Explanation:Immunologic Adverse Drug Reactions
Immunologic adverse drug reactions account for a small percentage of all adverse drug reactions, ranging from 5 to 10%. These reactions are classified using the Gell and Coombs system, which categorizes them into four groups: Type I, Type II, Type III, and Type IV reactions.
Type I reactions occur when a drug-IgE complex binds to mast cells, leading to the release of histamine and other inflammatory mediators. These reactions typically cause anaphylaxis, urticaria, and bronchospasm and occur within minutes to hours after exposure.
Type II reactions occur when an IgG of IgM antibody binds to a cell that has been altered by a drug-hapten. These reactions often manifest as blood abnormalities, such as thrombocytopenia and neutropenia, and their timing is variable.
Type III reactions occur when drug-antibody complexes activate the complement system, leading to fever, rash, urticaria, and vasculitis. These reactions occur 1 to 3 weeks after exposure.
Type IV reactions arise when the MHC system presents drug molecules to T cells, resulting in allergic contact dermatitis and rashes. These reactions occur 2 to 7 days after cutaneous exposure.
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This question is part of the following fields:
- Psychopharmacology
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Question 38
Correct
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A 25-year-old female attends clinic with her partner due to problems with anxiety. During the consultation the partner states that since they moved in together six months ago, he has heard her vomiting in the toilet. The lady admits to this but says she only does this after episodes where she loses control of her eating and eats far more food than she should. The partner comments that what she thinks is a large amount is actually more like a normal portion. She estimates that this happens a couple of times a week. She states that she is very insecure about her weight and can get quite obsessive about checking the calorie content of foods. A physical examination reveals a BMI of 20. Further questioning reveals only a mild anxiety disorder which has been present for approximately two months and is related to stress at work.
Which of the following diagnoses is most suggested?:Your Answer: Bulimia nervosa
Explanation:Based on the information provided, the most likely diagnosis is bulimia nervosa. Anorexia nervosa is not applicable as the individual’s BMI is not significantly low (less than 18.5). Binge eating disorder is also not applicable as the individual engages in compensatory behaviors such as induced vomiting. It is important to note that binge eating episodes can be either objective of subjective, but the key feature is the loss of control overeating.
Eating disorders are a serious mental health condition that can have severe physical and psychological consequences. The ICD-11 lists several types of eating disorders, including Anorexia Nervosa, Bulimia Nervosa, Binge Eating Disorder, Avoidant-Restrictive Food Intake Disorder, Pica, and Rumination-Regurgitation Disorder.
Anorexia Nervosa is characterized by significantly low body weight, a persistent pattern of restrictive eating of other behaviors aimed at maintaining low body weight, excessive preoccupation with body weight of shape, and marked distress of impairment in functioning. Bulimia Nervosa involves frequent episodes of binge eating followed by inappropriate compensatory behaviors to prevent weight gain, excessive preoccupation with body weight of shape, and marked distress of impairment in functioning. Binge Eating Disorder is characterized by frequent episodes of binge eating without compensatory behaviors, marked distress of impairment in functioning, and is more common in overweight and obese individuals. Avoidant-Restrictive Food Intake Disorder involves avoidance of restriction of food intake that results in significant weight loss of impairment in functioning, but is not motivated by preoccupation with body weight of shape. Pica involves the regular consumption of non-nutritive substances, while Rumination-Regurgitation Disorder involves intentional and repeated regurgitation of previously swallowed food.
It is important to seek professional help if you of someone you know is struggling with an eating disorder. Treatment may involve a combination of therapy, medication, and nutritional counseling.
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This question is part of the following fields:
- General Adult Psychiatry
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Question 39
Correct
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What are the factors that have been demonstrated to elevate the likelihood of suicide among prisoners?
Your Answer: Being on remand
Explanation:Suicide in Prison: High Rates and Risk Factors
Suicide rates among prisoners are significantly higher than in the general population, with an average rate of 133 per 100,000 population per year in England and Wales in 1999-2000. Remand prisoners had an even higher rate of 339 per 100,000 population per year. Early suicides were more common in drug-dependent prisoners, with 59% occurring within 7 days of reception into prison.
The most common method of suicide was hanging of self-strangulation, with bedclothes being the most common ligature used. Window bars, beds, and cell fittings such as lights, pipes, cupboards, sinks, toilets, of doors were the main ligature points. 72% of prisoners had at least one known psychiatric diagnosis, with drug dependence being the most common primary diagnosis at 27%. Schizophrenia was diagnosed in 6% of prisoners, and affective disorder in 18%.
Risk factors for suicide in prisoners include being in a single cell, being male, having a psychiatric illness, having a history of substance misuse, having a history of previous self-harm of attempted suicide, recent suicidal ideation, and being on remand. Surprisingly, being married was found to be a risk factor for suicide in prisoners, in contrast to the general population where it is a protective factor.
Overall, these findings highlight the urgent need for effective suicide prevention strategies in prisons, particularly for those at higher risk. This may include improved mental health services, better screening and assessment of risk factors, and measures to reduce access to means of suicide such as ligature points.
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This question is part of the following fields:
- Forensic Psychiatry
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Question 40
Incorrect
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What is a licensed treatment for bulimia nervosa?
Your Answer: Sertraline
Correct Answer: Fluoxetine
Explanation:Antidepressants (Licensed Indications)
The following table outlines the specific licensed indications for antidepressants in adults, as per the Maudsley Guidelines and the British National Formulary. It is important to note that all antidepressants are indicated for depression.
– Nocturnal enuresis in children: Amitriptyline, Imipramine, Nortriptyline
– Phobic and obsessional states: Clomipramine
– Adjunctive treatment of cataplexy associated with narcolepsy: Clomipramine
– Panic disorder and agoraphobia: Citalopram, Escitalopram, Sertraline, Paroxetine, Venlafaxine
– Social anxiety/phobia: Escitalopram, Paroxetine, Sertraline, Moclobemide, Venlafaxine
– Generalised anxiety disorder: Escitalopram, Paroxetine, Duloxetine, Venlafaxine
– OCD: Escitalopram, Fluoxetine, Fluvoxamine, Paroxetine, Sertraline, Clomipramine
– Bulimia nervosa: Fluoxetine
– PTSD: Paroxetine, Sertraline -
This question is part of the following fields:
- General Adult Psychiatry
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Question 41
Correct
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What is the accurate statement about the pathology of Parkinson's disease?
Your Answer: Pallor of the locus coeruleus is seen
Explanation:Lewy bodies are not exclusively indicative of a particular disease, as they can also be present in individuals with Alzheimer’s and even in those who do not exhibit any noticeable symptoms.
Parkinson’s Disease Pathology
Parkinson’s disease is a neurodegenerative disorder that affects the central nervous system. The pathology of Parkinson’s disease is very similar to that of Lewy body dementia. The macroscopic features of Parkinson’s disease include pallor of the substantia nigra (midbrain) and locus coeruleus (pons). The microscopic changes include the presence of Lewy bodies, which are intracellular aggregates of alpha-synuclein. Additionally, there is a loss of dopaminergic cells from the substantia nigra pars compacta. These changes contribute to the motor symptoms of Parkinson’s disease, such as tremors, rigidity, and bradykinesia. Understanding the pathology of Parkinson’s disease is crucial for developing effective treatments and improving the quality of life for those affected by this condition.
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This question is part of the following fields:
- Neurosciences
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Question 42
Correct
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Which statement about phencyclidine intoxication is accurate?
Your Answer: Nystagmus is a common feature
Explanation:PCP Intoxication: A Dangerous Hallucinogenic
Phencyclidine (PCP), also known as angel dust, is a hallucinogenic drug that is popular for inducing feelings of euphoria, superhuman strength, and social and sexual prowess. It is a NMDA receptor antagonist that has dissociative properties, similar to ketamine. PCP was previously used as an anesthetic and animal tranquilizer, but was soon recalled due to its adverse effects, including psychosis, agitation, and dysphoria post-operatively.
PCP is available in various forms, including white crystalline powder, tablets, crystals, and liquid. It can be snorted, smoked, ingested, of injected intravenously or subcutaneously. People who have taken PCP often present with violent behavior, nystagmus, tachycardia, hypertension, anesthesia, and analgesia. Other symptoms include impaired motor function, hallucinations, delusions, and paranoia.
PCP intoxication is best managed with benzodiazepines along with supportive measures for breathing and circulation. Antipsychotics are not recommended as they can amplify PCP-induced hyperthermia, dystonic reactions, and lower the seizure threshold. However, haloperidol may be useful for treating PCP-induced psychosis in patients who are not hyperthermic. Most deaths in PCP-intoxicated patients result from violent behavior rather than direct effects of the drug.
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This question is part of the following fields:
- Substance Misuse/Addictions
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Question 43
Incorrect
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On which chromosome is the candidate gene for schizophrenia that codes for the Catechol-O-Methyltransferase enzyme located?
Your Answer: 8
Correct Answer: 22
Explanation:Schizophrenia is a complex disorder that is associated with multiple candidate genes. No single gene has been identified as the sole cause of schizophrenia, and it is believed that the more genes involved, the greater the risk. Some of the important candidate genes for schizophrenia include DTNBP1, COMT, NRG1, G72, RGS4, DAOA, DISC1, and DRD2. Among these, neuregulin, dysbindin, and DISC1 are the most replicated and plausible genes, with COMT being the strongest candidate gene due to its role in dopamine metabolism. Low activity of the COMT gene has been associated with obsessive-compulsive disorder and schizophrenia. Neuregulin 1 is a growth factor that stimulates neuron development and differentiation, and increased neuregulin signaling in schizophrenia may suppress the NMDA receptor, leading to lowered glutamate levels. Dysbindin is involved in the biogenesis of lysosome-related organelles, and its expression is decreased in schizophrenia. DISC1 encodes a multifunctional protein that influences neuronal development and adult brain function, and it is disrupted in schizophrenia. It is located at the breakpoint of a balanced translocation identified in a large Scottish family with schizophrenia, schizoaffective disorder, and other major mental illnesses.
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This question is part of the following fields:
- Genetics
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Question 44
Correct
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Who is the individual that put forth a theory regarding cognitive development?
Your Answer: Piaget
Explanation:Developmental Stages
There are four main developmental models that are important to understand: Freud’s theory of psychosexual development, Erikson’s theory of psychosocial development, Piaget’s theory of cognitive development, and Kohlberg’s theory of moral development.
Freud’s theory of psychosexual development includes five stages: oral, anal, phallic, latency, and genital. These stages occur from birth to adulthood and are characterized by different areas of focus and pleasure.
Erikson’s theory of psychosocial development includes eight stages, each with a specific crisis to be resolved. These stages occur from infancy to old age and are focused on developing a sense of self and relationships with others.
Piaget’s theory of cognitive development includes four stages: sensorimotor, preoperational, concrete operational, and formal operational. These stages occur from birth to adulthood and are focused on the development of cognitive abilities such as perception, memory, and problem-solving.
Kohlberg’s theory of moral development includes three stages: preconventional, conventional, and postconventional. These stages occur from childhood to adulthood and are focused on the development of moral reasoning and decision-making.
Understanding these developmental models can help individuals better understand themselves and others, as well as provide insight into how to support healthy development at each stage.
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This question is part of the following fields:
- Psychological Development
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Question 45
Incorrect
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What is the recommended duration of bed rest per day for a patient with anorexia nervosa and a BMI below 13?
Your Answer: 12 hours
Correct Answer: 24 hours
Explanation:According to the MARSIPAN guidelines, individuals with anorexia and a BMI below 13 should be placed on 24-hour bed rest and given careful consideration for prophylaxis against deep vein thrombosis. This recommendation is outlined in the October 2010 College Report CR 162, which was jointly produced by the Royal College of Psychiatrists and the Royal College of Physicians in London.
Anorexia is a serious mental health condition that can have severe physical complications. These complications can affect various systems in the body, including the cardiac, skeletal, hematologic, reproductive, metabolic, gastrointestinal, CNS, and dermatological systems. Some of the recognized physical complications of anorexia nervosa include bradycardia, hypotension, osteoporosis, anemia, amenorrhea, hypothyroidism, delayed gastric emptying, cerebral atrophy, and lanugo.
The Royal College of Psychiatrists has issued advice on managing sick patients with anorexia nervosa, recommending hospital admission for those with high-risk items. These items include a BMI of less than 13, a pulse rate of less than 40 bpm, a SUSS test score of less than 2, a sodium level of less than 130 mmol/L, a potassium level of less than 3 mmol/L, a serum glucose level of less than 3 mmol/L, and a QTc interval of more than 450 ms. The SUSS test involves assessing the patient’s ability to sit up and squat without using their hands. A rating of 0 indicates complete inability to rise, while a rating of 3 indicates the ability to rise without difficulty. Proper management and treatment of anorexia nervosa are crucial to prevent of manage these physical complications.
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This question is part of the following fields:
- General Adult Psychiatry
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Question 46
Correct
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A 14-year-old boy is brought to your outpatient clinic by his parents. He believes he is overweight despite having a BMI within the normal range. He is excessively exercising and restricting his food intake, resulting in rapid weight loss. He has been experiencing fatigue and has a haemoglobin level of 85 g/L.
What do you anticipate to observe on his blood film?Your Answer: Normochromic normocytic
Explanation:The patient’s symptoms suggest that they have anorexia nervosa. Typically, the anemia that accompanies this condition is normochromic normocytic. It is crucial to note that if hypochromic microcytic anemia is present, it may indicate iron deficiency caused by hidden gastrointestinal bleeding.
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This question is part of the following fields:
- Child And Adolescent Psychiatry
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Question 47
Correct
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Which personality disorder does not belong to the cluster B category?
Your Answer: Paranoid personality disorder
Explanation:Personality Disorder Classification
A personality disorder is a persistent pattern of behavior and inner experience that deviates significantly from cultural expectations, is inflexible and pervasive, and causes distress of impairment. The DSM-5 and ICD-11 have different approaches to classifying personality disorders. DSM-5 divides them into 10 categories, grouped into clusters A, B, and C, while ICD-11 has a general category with six trait domains that can be added. To diagnose a personality disorder, the general diagnostic threshold must be met before determining the subtype(s) present. The criteria for diagnosis include inflexibility and pervasiveness of the pattern, onset in adolescence of early adulthood, stability over time, and significant distress of impairment. The disturbance must not be better explained by another mental disorder, substance misuse, of medical condition.
Course
Borderline and antisocial personality disorders tend to become less evident of remit with age, while others, particularly obsessive-compulsive and schizotypal, may persist.
Classification
The DSM-5 divides personality disorders into separate clusters A, B, and C, with additional groups for medical conditions and unspecified disorders. The ICD-11 dropped the separate categories and instead lists six trait domains that can be added to the general diagnosis.
UK Epidemiology
The prevalence of personality disorders in Great Britain, according to the British National Survey of Psychiatric Morbidity, is 4.4%, with cluster C being the most common at 2.6%, followed by cluster A at 1.6% and cluster B at 1.2%. The most prevalent specific personality disorder is obsessive-compulsive (anankastic) at 1.9%.
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This question is part of the following fields:
- Classification And Assessment
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Question 48
Correct
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A 67-year-old man experiences difficulty with recalling recent events and struggles to identify familiar objects. He is diagnosed with Alzheimer's disease and a CT scan is ordered. What is the most probable result of the scan?
Your Answer: Decreased hippocampal volume
Explanation:Individuals diagnosed with Alzheimer’s dementia exhibit reduced volumes of the hippocampus and entorhinal cortex, which are crucial for memory consolidation and recall. Additionally, they may display widespread cerebral atrophy and enlarged ventricles.
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This question is part of the following fields:
- Old Age Psychiatry
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Question 49
Correct
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Which option is not suggested by NICE for aiding relapse prevention in individuals with alcohol addiction?
Your Answer: Diazepam
Explanation:Anticonvulsants are not recommended for relapse prevention in alcohol dependence. While some studies have shown potential benefits for certain anticonvulsants, such as carbamazepine and valproate, the evidence is not strong enough to support their routine use. Additionally, these drugs can have significant side effects, including liver toxicity and blood disorders, and require careful monitoring. Therefore, they are not recommended by NICE for this indication.
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This question is part of the following fields:
- Substance Misuse/Addictions
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Question 50
Correct
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A woman with alcohol dependency and depression attends clinic and informs you that she intends to stop drinking alcohol. She is adamant that she does not want any medication to assist in the detox but is keen to know how long the withdrawal symptoms may last. What would be the accurate estimate of the potential length of the withdrawal?
Your Answer: 14 days
Explanation:Alcohol withdrawal is characterized by overactivity of the autonomic nervous system, resulting in symptoms such as agitation, tremors, sweating, nausea, vomiting, fever, and tachycardia. These symptoms typically begin 3-12 hours after drinking stops, peak between 24-48 hours, and can last up to 14 days. Withdrawal seizures may occur before blood alcohol levels reach zero, and a small percentage of people may experience delirium tremens (DT), which can be fatal if left untreated. Risk factors for DT include abnormal liver function, old age, severity of withdrawal symptoms, concurrent medical illness, heavy alcohol use, self-detox, previous history of DT, low potassium, low magnesium, and thiamine deficiency.
Pharmacologically assisted detox is often necessary for those who regularly consume more than 15 units of alcohol per day, and inpatient detox may be needed for those who regularly consume more than 30 units per day. The Clinical Institute Withdrawal Assessment of Alcohol Scale (CIWA-Ar) can be used to assess the severity of withdrawal symptoms and guide treatment decisions. Benzodiazepines are the mainstay of treatment, as chronic alcohol exposure results in decreased overall brain excitability and compensatory decrease of GABA-A neuroreceptor response to GABA. Chlordiazepoxide is a good first-line agent, while oxazepam, temazepam, and lorazepam are useful in patients with liver disease. Clomethiazole is effective but carries a high risk of respiratory depression and is not recommended. Thiamine should be offered to prevent Wernicke’s encephalopathy, and long-acting benzodiazepines can be used as prophylaxis for withdrawal seizures. Haloperidol is the treatment of choice if an antipsychotic is required.
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This question is part of the following fields:
- Substance Misuse/Addictions
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