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 Best of Five 236

 

   

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BOF: 236

A 32-year-old male presents following an injury to his right upper limb. On examination of the right upper limb there is incomplete and defective pronation. The wrist flexors are paralysed when examined against resistance. When this is tested the tendon of flexor carpi ulnaris stands out and the hand becomes ulnar deviated. Flexion of the ulnar two fingers is possible although it is weaker than normal. The index finger cannot be flexed and the middle finger can only be flexed incompletely. Flexion at the metacarpophalangeal joints is possible. Flexion of the terminal interphalangeal joint of the thumb is not possible if the proximal phalanx of the thumb is immobilised. Abduction and opposition of the thumb is defective. There is sensory loss over the lateral three and a half digits of the hand and the lateral aspect of the palm.

In this patient the injury is at the:

a)      Median nerve at the wrist

b)      Median nerve at the elbow

c)      Ulnar nerve at the elbow

d)      Ulnar nerve at the wrist

e)    Musculocutaneous nerve

 

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