A 23-year-old man is brought to the emergency department after a knife wound to the anterior shoulder. He reports difficulty lifting objects with the affected arm. Examination shows weakness of elbow flexion and forearm supination. Sensation is decreased over the lateral forearm, but wrist extension is intact. Which of the following nerves is most likely injured?
- A)Radial nerve
- B)Ulnar nerve
- C)Median nerve
- D)Axillary nerve
- E)Musculocutaneous nerveGABARITO
Explicação
The musculocutaneous nerve pierces coracobrachialis and supplies biceps brachii and brachialis. Injury therefore causes weak elbow flexion and supination together with sensory loss over the lateral forearm through the lateral antebrachial cutaneous nerve, matc... Ver explicação completa e trilha adaptativa →