Peripheral Nerve Injuries · NEET PG Preparation Orthopaedics
A patient presents with a deep laceration across the volar aspect of the wrist. Clinical examination reveals weakness in pinch grip (anterior interos…
Practice question from Peripheral Nerve Injuries (NEET PG Preparation Orthopaedics), with the correct answer and a step-by-step solution.
medium · MCQ · Q-D94DC7
A patient presents with a deep laceration across the volar aspect of the wrist. Clinical examination reveals weakness in pinch grip (anterior interosseous-like presentation in the hand intrinsics), sensory loss over the radial three and a half digits on the palmar aspect, and flattening of the thenar eminence with inability to properly oppose the thumb. Which nerve is most likely injured?
- A.Ulnar nerve
- B.Median nerveCorrect answer
- C.Radial nerve
- D.Musculocutaneous nerve
Solution
The median nerve provides motor innervation to the thenar muscles (abductor pollicis brevis, flexor pollicis brevis superficial head, opponens pollicis) and sensation to the palmar aspect of the radial 3.5 digits. Lacerations at the wrist level characteristically result in thenar wasting, loss of thumb opposition, and sensory deficits in the median distribution.
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