A 33-year-old man with a history of heavy alcohol use falls asleep in a chair with his arm draped over the backrest. Upon awakening, he is unable to extend his wrist and fingers. Physical examination reveals decreased sensation over the dorsal first web space and normal biceps strength. His vital signs are stable: BP 128/82 mmHg, HR 76/min, RR 14/min. Nerve conduction studies show slowed conduction velocity in the radial nerve distribution. Which nerve is most likely injured?
- A)Musculocutaneous nerve
- B)Median nerve
- C)Ulnar nerve
- D)Axillary nerve
- E)Radial nerveGABARITO
Explicação
Compression of the radial nerve in the spiral groove causes wrist drop and sensory loss over the dorsal first web space. This is classically called Saturday night palsy. Ver explicação completa e trilha adaptativa →