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MBBS QUESTION #10175
Question 1
A patient sustains a mid-shaft humeral fracture and subsequently develops wrist drop with sensory loss over the dorsal web space between the thumb and index finger. Which nerve has most likely been injured?
  • Median nerve
  • Ulnar nerve
  • Radial nerve✔️
  • Axillary nerve
Correct Answer Explanation
The radial nerve winds around the humeral shaft in the spiral (radial) groove, making it vulnerable in mid-shaft fractures; injury causes wrist drop (loss of wrist/finger extension) and sensory loss over the first dorsal web space.