Gross Anatomy USMLE Step 1 Practice Question
A 34-year-old male presents to the emergency department with a deep laceration of the first web space of his hand sustained during a rock-climbing accident. Vital signs show BP 128/82 mmHg, HR 92 bpm, RR 16/min, and temperature 37.2°C. Physical examination reveals active bleeding and inability to abduct the thumb. Radiographs show no fractures. The patient denies numbness in the radial dorsal hand. Which of the following structures is also likely to be injured?
Answer choices
- ADeep branch of radial nerve
- BRadial arteryCorrect answer
- COpponens pollicis
- DSuperficial palmar arch
- ERecurrent branch of median nerve
- FExtensor pollicis brevis tendon
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