AKT-5300

AKT-5300

A 25-year-old man comes to his General Practitioner complaining of progressive numbness in his feet and weakness in his lower limbs. These symptoms have developed over the past week. He has a broad-based ataxic gait. He has a history of using ‘laughing gas’ recreationally. His aunt has multiple sclerosis (MS) and he is concerned that he may be experiencing the first signs of the condition. What neurological finding would be most indicative of an alternative diagnosis?