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  • Question 1 - Which of the following occurs at the transverse thoracic plane: ...

    Incorrect

    • Which of the following occurs at the transverse thoracic plane:

      Your Answer:

      Correct Answer: Bifurcation of the trachea

      Explanation:

      A way to help remember the structures transected by the transverse thoracic plane is CLAPTRAP:
      C: cardiac plexus
      L: ligamentum arteriosum
      A: aortic arch (inner concavity)
      P: pulmonary trunk
      T: tracheal bifurcation (carina)
      R: right-to-left movement of the thoracic duct (posterior to the oesophagus)
      A: azygos vein drains into superior vena cava
      P: pre-vertebral fascia and pre-tracheal fascia end

    • This question is part of the following fields:

      • Anatomy
      • Thorax
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  • Question 2 - A 70-year-old woman presents with right-sided loss of pain and temperature sense on...

    Incorrect

    • A 70-year-old woman presents with right-sided loss of pain and temperature sense on the body as well as left-sided loss of pain and temperature sense on the face. She also has complaints of vertigo, nausea, and tinnitus. Further examination of her cranial nerves suggest the presence of Horner's Syndrome. An MRI and CT scan was ordered and results showed that she is suffering from a left-sided stroke.

      Branches of which of the following arteries are most likely implicated in the case?

      Your Answer:

      Correct Answer: Posterior inferior cerebellar artery

      Explanation:

      Wallenberg syndrome is also known as lateral medullary syndrome and posterior inferior cerebellar artery syndrome. It is the most common posterior circulation ischemic stroke syndrome. The primary pathology of Wallenberg syndrome is occlusion of the posterior inferior cerebellar artery (PICA) or one of its branches.

      It is characterized by vertigo with nystagmus, nausea and vomiting, and sometimes hiccups, dysphonia, dysarthria, and dysphagia often present with ipsilateral loss of gag reflex, ipsilateral ataxia with a tendency to fall to the ipsilateral side, pain and numbness with impaired facial sensation on the face, impaired taste sensation, and impaired pain and temperature sensation in the arms and legs.

    • This question is part of the following fields:

      • Anatomy
      • Central Nervous System
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  • Question 3 - Which of these drugs may reduce the efficacy of contraception? ...

    Incorrect

    • Which of these drugs may reduce the efficacy of contraception?

      Your Answer:

      Correct Answer: Carbamazepine

      Explanation:

      Antiepileptic medications such as carbamazepine (Tegretol), topiramate (Topamax), and phenytoin (Dilantin) are widely known for reducing the contraceptive effectiveness of OCPs.

    • This question is part of the following fields:

      • Central Nervous System
      • Pharmacology
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  • Question 4 - A patient presents with pain in the wrist and a tingling in the...

    Incorrect

    • A patient presents with pain in the wrist and a tingling in the hand. On examination Tinel's test is positive and you diagnose carpal tunnel syndrome. Regarding the carpal tunnel, which of the following statements is INCORRECT:

      Your Answer:

      Correct Answer: The tendons of the flexor digitorum profundus, flexor digitorum superficialis and flexor pollicis longus lie within a single synovial sheath.

      Explanation:

      Free movement of the tendons in the carpal tunnel is facilitated by synovial sheaths, which surround the tendons. All of the tendons of the FDP and FDS are contained within a single synovial sheath with a separate sheath enclosing the tendon of the FPL.

    • This question is part of the following fields:

      • Anatomy
      • Upper Limb
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  • Question 5 - The following statements are not true of the flexor digiti minimi brevis, except?...

    Incorrect

    • The following statements are not true of the flexor digiti minimi brevis, except?

      Your Answer:

      Correct Answer: It is situated on the radial border of abductor digiti minimi

      Explanation:

      Flexor digiti minimi brevis muscle is located on the ulnar side of the palm, lying on the radial border of the abductor digiti minimi. Together with the abductor digiti minimi and opponens digiti minimi muscles, it forms the hypothenar eminence. The muscle is situated inferior and lateral to adductor digiti minimi muscle and superior and medial to opponens digiti minimi muscle. The proximal parts of flexor digiti minimi brevis and abductor digiti minimi muscles form a gap through which deep branches of the ulnar artery and ulnar nerve pass.

    • This question is part of the following fields:

      • Anatomy
      • Upper Limb
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  • Question 6 - In inserting a nasogastric tube, which area is least likely to be a...

    Incorrect

    • In inserting a nasogastric tube, which area is least likely to be a site of resistance when the tube goes from the nose to the stomach?

      Your Answer:

      Correct Answer: In the posterior mediastinum where the oesophagus is crossed by the pulmonary trunk

      Explanation:

      In the posterior mediastinum where the oesophagus is crossed by the pulmonary trunk offers the least resistance when nasogastric tube is inserted from the nose to the stomach.

    • This question is part of the following fields:

      • Anatomy
      • Thorax
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  • Question 7 - Which of the following is a contraindication to the use of opioid analgesics: ...

    Incorrect

    • Which of the following is a contraindication to the use of opioid analgesics:

      Your Answer:

      Correct Answer: Raised intracranial pressure

      Explanation:

      Opioids should be avoided in people who have:
      A risk of paralytic ileus (opioids reduce gastric motility)
      Acute respiratory depressionAn acute exacerbation of asthma (opioids can aggravate bronchoconstriction as a result of histamine release)
      Conditions associated with increased intracranial pressure including head injury (opioids can interfere with pupillary response making neurological assessment difficult and may cause retention of carbon dioxide aggravating the increased intracranial pressure)

    • This question is part of the following fields:

      • Central Nervous System
      • Pharmacology
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  • Question 8 - Regarding the abductor digiti minimi, which of the following statements is false? ...

    Incorrect

    • Regarding the abductor digiti minimi, which of the following statements is false?

      Your Answer:

      Correct Answer: It assists with flexion of the fifth finger at the middle phalanx

      Explanation:

      Abductor digiti minimi is a short intrinsic muscle of the hand. It belongs to the group of muscles collectively called hypothenar muscles due to their acting on the 5th finger. Besides abductor digiti minimi, other hypothenar muscles include flexor digiti minimi brevis and opponens digiti minimi.

      The main function of abductor digiti minimi involves abduction of the 5th finger, as well as flexion of its proximal phalanx. Along with other hypothenar muscles, this muscle forms the hypothenar eminence on the medial side of the palm.

      Like other hypothenar muscles, abductor digiti minimi receives nervous supply from the deep branch of the ulnar nerve, derived from root values C8 and T1.

      Abductor digiti minimi receives arterial blood supply from the palmar branch of ulnar artery, palmar digital artery, as well as branches of the ulnar side of the superficial palmar arch. The venous blood from the muscle is drained via the venous networks of the palm into the deep veins of the arm (vv. ulnares).

    • This question is part of the following fields:

      • Anatomy
      • Upper Limb
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  • Question 9 - A patient suffers a lower limb fracture that causes damage to the nerve...

    Incorrect

    • A patient suffers a lower limb fracture that causes damage to the nerve that innervates peroneus brevis.
      Peroneus brevis receives its innervation from which of the following nerves? Select ONE answer only.

      Your Answer:

      Correct Answer: Superficial peroneal nerve

      Explanation:

      Peroneus brevis is innervated by the superficial peroneal nerve.
      Peroneus longus is innervated by the superficial peroneal nerve.
      Peroneus tertius is innervated by the deep peroneal nerve.

    • This question is part of the following fields:

      • Anatomy
      • Lower Limb
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  • Question 10 - In adults, the conus medullaris of the spinal cord lies at which of...

    Incorrect

    • In adults, the conus medullaris of the spinal cord lies at which of the following vertebral levels:

      Your Answer:

      Correct Answer: L1/L2

      Explanation:

      At birth, the conus medullaris lies at L3. By the age of 21, it sits at L1/L2.

    • This question is part of the following fields:

      • Anatomy
      • Head And Neck
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  • Question 11 - A 25-year-old guy who has had a knee-high plaster cast on his left...

    Incorrect

    • A 25-year-old guy who has had a knee-high plaster cast on his left leg for the past 5 weeks arrives at the emergency department complaining of numbness on the dorsum of his left foot and an inability to dorsiflex or evert his foot. You know that his symptoms are due to fibular nerve compression. Where is the fibular nerve located?

      Your Answer:

      Correct Answer: Neck of fibula

      Explanation:

      Dorsiflexion and eversion of the foot are innervated by the deep fibular nerve and the superficial fibular nerve, respectively.

      The common fibular nerve runs obliquely downward along the lateral border of the popliteal fossa (medial to the biceps femoris) before branching at the neck of the fibula.

      Thus, it is prone to being affected during an impact injury or fracture to the bone or leg. Casts that are placed too high can also compress the fibular nerve.

    • This question is part of the following fields:

      • Anatomy
      • Lower Limb
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  • Question 12 - Superficial fibular nerve palsy results in which of the following clinical features: ...

    Incorrect

    • Superficial fibular nerve palsy results in which of the following clinical features:

      Your Answer:

      Correct Answer: Loss of eversion of the foot

      Explanation:

      Damage to the superficial fibular nerve results in loss of eversion of the foot and loss of sensation over the lower anterolateral leg and the dorsum of the foot.

    • This question is part of the following fields:

      • Anatomy
      • Lower Limb
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  • Question 13 - At which opioid receptors do opioid analgesics act primarily? ...

    Incorrect

    • At which opioid receptors do opioid analgesics act primarily?

      Your Answer:

      Correct Answer: Mu

      Explanation:

      Opioid receptors are widely distributed throughout the central nervous system. Opioid analgesics mimic endogenous opioid peptides by causing prolonged activation of these receptors, mainly the mu(μ)-receptors which are the most highly concentrated in brain areas involved in nociception.

    • This question is part of the following fields:

      • Central Nervous System
      • Pharmacology
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  • Question 14 - A 36-year-old man who works in a farm presents with a deep laceration...

    Incorrect

    • A 36-year-old man who works in a farm presents with a deep laceration over the palm of his hand. A median nerve block was performed at his wrist to facilitate wound exploration and closure.

      Which of the following statements regarding median nerve blocks at the wrist is considered correct?

      Your Answer:

      Correct Answer: The needle should be inserted approximately 2.5 cm proximal to flexor retinaculum

      Explanation:

      A median nerve block is a simple, safe, and effective method of obtaining anaesthesia to the palmar aspect of the thumb, index finger, middle finger, radial portion of the palm and ring finger. The median nerve lies deep to the flexor retinaculum and about one centimetre under the skin of the volar wrist.
      The palmaris longus tendon lies superficial to the retinaculum and is absent in up to 20% of patients.
      The median nerve is located slightly lateral (radial) to the palmaris longus tendon and medial (ulnar) to the flexor carpi radialis tendon.

      The procedure is as follows:
      – Check sensation and motor function of the median nerve. Wear gloves and use appropriate barrier precautions.
      – Locate the flexor carpi radialis and palmaris longus tendons, which become prominent when the patient flexes the wrist against resistance. The palmaris longus tendon is usually the more prominent of the two tendons.
      – Needle-entry site: The needle will be inserted adjacent to the radial (lateral) border of the palmaris longus tendon just proximal to the proximal wrist crease. If the palmaris longus tendon is absent, the needle-entry site is about 1 cm ulnar to the flexor carpi radialis tendon.
      – Cleanse the site with antiseptic solution. Place a skin wheal of anaesthetic, if one is being used, at the needle-entry site.
      – Insert the needle perpendicularly through the skin and advance it slowly until a slight pop is felt as the needle penetrates the flexor retinaculum. When paraesthesia in the distribution of the median nerve confirms proper needle placement, withdraw the needle 1 to 2 mm.
      – Aspirate to exclude intravascular placement and then slowly (i.e., over 30 to 60 seconds) inject about 3 mL of anaesthetic. If the patient does not feel paraesthesia, redirect the needle in an ulnar direction, under the palmaris longus tendon. If paraesthesia is still not felt, slowly inject 3 to 5 mL of anaesthetic in the proximity of the nerve 1 cm deep to the tendon.
      – Allow about 5 to 10 minutes for the anaesthetic to take effect.

    • This question is part of the following fields:

      • Anatomy
      • Upper Limb
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  • Question 15 - You note that the prostate of a 60-year-old patient is enlarged during the...

    Incorrect

    • You note that the prostate of a 60-year-old patient is enlarged during the examination. You suspect BPH. Anatomically, the prostate has four main lobes. Which of the lobes is affected by benign prostatic hypertrophy?

      Your Answer:

      Correct Answer: Median lobe

      Explanation:

      Benign prostatic hyperplasia (BPH), also known as benign prostatic hypertrophy, is characterized by an enlarged prostate gland.

      The prostate is divided into four major lobes. The median lobe is the most commonly affected by benign prostatic enlargement, resulting in urethral obstruction and urine symptoms.

    • This question is part of the following fields:

      • Abdomen
      • Anatomy
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  • Question 16 - Which of the following is NOT a typical feature of an abducens nerve...

    Incorrect

    • Which of the following is NOT a typical feature of an abducens nerve palsy:

      Your Answer:

      Correct Answer: Inability to look up

      Explanation:

      CN VI palsies result in a convergent squint at rest (eye turned inwards) with inability to abduct the eye because of unopposed action of the rectus medialis. The patient complains of horizontal diplopia when looking towards the affected side. With complete paralysis, the eye cannot abduct past the midline.

    • This question is part of the following fields:

      • Anatomy
      • Cranial Nerve Lesions
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  • Question 17 - Which of the following statements is correct regarding paracetamol? ...

    Incorrect

    • Which of the following statements is correct regarding paracetamol?

      Your Answer:

      Correct Answer: Liver damage peaks 3 to 4 days after paracetamol ingestion.

      Explanation:

      The maximum daily dose of paracetamol in an adult is 4 grams. Doses greater than this can lead to hepatotoxicity and, less frequently, acute kidney injury. Early symptoms of paracetamol toxicity include nausea, vomiting, and abdominal pain, and usually settle within 24 hours. Symptoms of liver damage include right subcostal pain and tenderness, and this peaks 3 to 4 days after paracetamol ingestion. Other signs of hepatic toxicity include encephalopathy, bleeding, hypoglycaemia, and cerebral oedema.

    • This question is part of the following fields:

      • Central Nervous System
      • Pharmacology
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  • Question 18 - A 28-year-old woman with history of blunt thoracic trauma develops hypotension chest pain,...

    Incorrect

    • A 28-year-old woman with history of blunt thoracic trauma develops hypotension chest pain, and breathlessness. A bedside echocardiogram was performed and revealed a large pericardial effusion. Due to this finding, a pericardiocentesis was to be performed.

      Which of the following statements is considered true regarding pericardiocentesis?

      Your Answer:

      Correct Answer: The needle should be aimed at the midpoint of the left clavicle

      Explanation:

      Pericardiocentesis is a procedure done to remove fluid build-up in the sac around the heart known as the pericardium. The pericardium can be tapped from almost any reasonable location on the chest wall. However, for the usual blind pericardiocentesis, the subxiphoid approach is preferred. Ideally, 2-D echocardiography is used to guide needle insertion and the subsequent path of the needle/catheter.

      In the subxiphoid approach, the needle is inserted 1 cm inferior to the left xiphocostal angle with an angle of 30 degrees from the patient’s chest with a direction towards the left mid-clavicle.

      The fingers may sense a distinct give when the needle penetrates the parietal pericardium. Successful removal of fluid confirms the needle’s position.

    • This question is part of the following fields:

      • Anatomy
      • Thorax
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  • Question 19 - Which of the following nerves supply the superficial head of the flexor pollicis...

    Incorrect

    • Which of the following nerves supply the superficial head of the flexor pollicis brevis muscle?

      Your Answer:

      Correct Answer: The recurrent branch of the median nerve

      Explanation:

      The two heads of the flexor pollicis brevis usually differ in their innervation. The superficial head of flexor pollicis muscle receives nervous supply from the recurrent branch of the median nerve, whereas the deep head receives innervation from the deep branch of the ulnar nerve, derived from spinal roots C8 and T1.

    • This question is part of the following fields:

      • Anatomy
      • Upper Limb
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  • Question 20 - Which of the following is a contraindication for aspirin? ...

    Incorrect

    • Which of the following is a contraindication for aspirin?

      Your Answer:

      Correct Answer: Children under 16 years

      Explanation:

      Aspirin contraindications include: hypersensitivity to NSAIDs; asthma, rhinitis, and nasal polyps; and usage in children or teens.
      There is little evidence of allergic cross-reactivity for salicylates. However, due to similarities in chemical structure and/or pharmacologic activities, the possibility of cross-sensitivity cannot be completely ruled out.

    • This question is part of the following fields:

      • Central Nervous System
      • Pharmacology
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  • Question 21 - After an accidental fall, a 75-year-old patient complains of neck pain and weakness...

    Incorrect

    • After an accidental fall, a 75-year-old patient complains of neck pain and weakness in his upper limbs. Select the condition that most likely caused the neck pain and weakness of the upper limbs of the patient.

      Your Answer:

      Correct Answer: Central cord syndrome

      Explanation:

      The cervical spinal cord is the section of the spinal cord that goes through the bones of the neck.

      It is injured incompletely in the central cord syndrome (CCS). This will result in arm weakness more than leg weakness.

    • This question is part of the following fields:

      • Anatomy
      • Central Nervous System
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  • Question 22 - A 25 year old man has sustained a fracture to the surgical neck...

    Incorrect

    • A 25 year old man has sustained a fracture to the surgical neck of the humerus after falling from his bike. Examination suggests an axillary nerve injury. The clinical features expected to be seen in this patient are:

      Your Answer:

      Correct Answer: Weakness of shoulder abduction

      Explanation:

      Axillary nerve injury results in:
      1. weakness of arm abduction (paralysis of deltoid),
      2. weakness of lateral rotation of the arm (paralysis of teres minor)
      3. loss of sensation over the regimental badge area.

    • This question is part of the following fields:

      • Anatomy
      • Upper Limb
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  • Question 23 - A 27-year-old athlete presents with buttock pain after tearing his gluteus maximus muscle.

    In...

    Incorrect

    • A 27-year-old athlete presents with buttock pain after tearing his gluteus maximus muscle.

      In which of the following nerves is the gluteus maximus muscle innervated by?

      Your Answer:

      Correct Answer: Inferior gluteal nerve

      Explanation:

      The gluteal muscles are a group of muscles that make up the buttock area. These muscles include: gluteus maximus, gluteus medius. and gluteus minimus.
      The gluteus maximus is the most superficial as well as largest of the three muscles and makes up most of the shape and form of the buttock and hip area. It is a thick, fleshy muscle with a quadrangular shape. It is a large muscle and plays a prominent role in the maintenance of keeping the upper body erect.
      The innervation of the gluteus maximus muscle is from the inferior gluteal nerve.

    • This question is part of the following fields:

      • Anatomy
      • Lower Limb
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  • Question 24 - A 26-year-old man is involved in a motorcycle accident that results in an...

    Incorrect

    • A 26-year-old man is involved in a motorcycle accident that results in an open fracture of his tibia and fibula. The nerve that innervates peroneus tertius is damaged as a consequence of his injuries.
      Peroneus tertius receives its innervation from which of the following nerves? Select ONE answer only.

      Your Answer:

      Correct Answer: Deep peroneal nerve

      Explanation:

      Peroneus brevis is innervated by the superficial peroneal nerve.
      Peroneus longus is innervated by the superficial peroneal nerve.
      Peroneus tertius is innervated by the deep peroneal nerve.

    • This question is part of the following fields:

      • Anatomy
      • Lower Limb
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  • Question 25 - Which of the following statements about lithium treatment is FALSE: ...

    Incorrect

    • Which of the following statements about lithium treatment is FALSE:

      Your Answer:

      Correct Answer: Concomitant treatment with NSAIDs decreases serum-lithium concentration.

      Explanation:

      Lithium levels are raised by NSAIDs because renal clearance is reduced. Lithium is a small ion (74 Daltons) with no protein or tissue binding and is therefore amenable to haemodialysis. Lithium is freely distributed throughout total body water with a volume of distribution between 0.6 to 0.9 L/kg, although the volume may be smaller in the elderly, who have less lean body mass and less total body water. Steady-state serum levels are typically reached within five days at the usual oral dose of 1200 to 1800 mg/day. The half-life for lithium is approximately 18 hours in adults and 36 hours in the elderly.
      Lithium is excreted almost entirely by the kidneys and is handled in a manner similar to sodium. Lithium is freely filtered but over 60 percent is then reabsorbed by the proximal tubules.

    • This question is part of the following fields:

      • Central Nervous System
      • Pharmacology
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  • Question 26 - A tumour is discovered behind the pectinate line during an examination of a...

    Incorrect

    • A tumour is discovered behind the pectinate line during an examination of a 72-year-old patient with rectal bleeding. Which of the following is the lymphatic drainage of the pectinate line?

      Your Answer:

      Correct Answer: Superficial inguinal nodes

      Explanation:

      The pectinate line is known as the watershed line because it divides the anal canal into two sections. Below the pectinate line, lymphatic drainage drains to the superficial inguinal lymph nodes.

    • This question is part of the following fields:

      • Abdomen
      • Anatomy
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  • Question 27 - You assess a patient that has suffered a nerve injury that has paralysed...

    Incorrect

    • You assess a patient that has suffered a nerve injury that has paralysed her left latissimus dorsi muscle.
      Latissimus dorsi receives its innervation from which of the following nerves? Select ONE answer only.

      Your Answer:

      Correct Answer: Thoracodorsal nerve

      Explanation:

      Latissimus dorsi originates from the lower part of the back, where it covers a wide area. It lies underneath the inferior fibres of trapezius superiorly, and trapezius is the most superficial back muscle.
      Superficial muscles of the back showing latissimus dorsi (from Gray’s Anatomy)
      Latissimus dorsi has a broad origin, arising from the spinous processes of T6-T12, the thoracolumbar fascia, the iliac crest and the inferior 3 or 4 ribs. The fibres converge into a tendon that inserts into the intertubercular groove of the humerus.
      Latissimus dorsi is innervated by the thoracodorsal nerve.
      Latissimus dorsi acts to extend, adduct and medially rotate the humerus. It, therefore, raises the body towards the arm during climbing.

    • This question is part of the following fields:

      • Anatomy
      • Upper Limb
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  • Question 28 - A man presents to the emergency department with an injury that has damaged...

    Incorrect

    • A man presents to the emergency department with an injury that has damaged the opponens pollicis muscle.

      Which of the following statements regarding the opponens pollicis muscle is considered correct?

      Your Answer:

      Correct Answer: It flexes the first metacarpal bone at the carpometacarpal joint

      Explanation:

      Opponens pollicis is a muscle of thenar eminence, it is triangular in shape and lies deep to flexor pollicis brevis and abductor pollicis brevis. It originates from the flexor retinaculum, tubercles of scaphoid and trapezium, abductor pollicis longus tendon.

      Its insertion is in the radial side of the base of proximal phalanx of thumb. It is supplied by the median nerve (C8, T1). It receives blood supply from superficial arch.

      It flexes the metacarpal bone medially across the palm, also rotating it medially, causing opposition, the palmar aspect of the terminal segment of thumb contacts the flexor aspects of any other digit.

    • This question is part of the following fields:

      • Anatomy
      • Upper Limb
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  • Question 29 - A 53-year-old man arrives at the emergency department complaining of visual impairment in...

    Incorrect

    • A 53-year-old man arrives at the emergency department complaining of visual impairment in his right eye. On examination, you notice that neither his right nor left pupil constricts when you shine a light in his right eye. When you flash a light in his left eye, the pupils of both his left and right eyes constrict. Which of the following nerves is the most likely to be affected:

      Your Answer:

      Correct Answer: Optic nerve

      Explanation:

      In full optic nerve palsy, the afferent pupillary light reflex is lost. Because the afferent optic nerve does not sense light flashed in the afflicted eye, the ipsilateral direct and contralateral consensual reflexes are gone. However, the contralateral direct and ipsilateral consensual reflexes are intact because the efferent oculomotor nerve is normal.

    • This question is part of the following fields:

      • Anatomy
      • Cranial Nerve Lesions
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  • Question 30 - Elevation of the eyeball is primarily produced by which of the following muscles:...

    Incorrect

    • Elevation of the eyeball is primarily produced by which of the following muscles:

      Your Answer:

      Correct Answer: Superior rectus and inferior oblique

      Explanation:

      Elevation of the eyeball is produced by the superior rectus and the inferior oblique muscles.

    • This question is part of the following fields:

      • Anatomy
      • Head And Neck
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