A 19-year-old man is brought to the emergency department 20 minutes after he sustained a stab wound to the right upper arm during a bar fight. Physical examination shows a 2-cm stab wound over the anterior aspect of the shoulder just medial to the coracoid process. Sensation to pinprick is absent over the lateral aspect of the right forearm. The physician suspects an injury to the nerve indicated by the X in the diagram. As a result of this injury, which of the following movements will most likely be impaired in this patient? A Shoulder abduction B Shoulder adduction C Shoulder external rotation D Shoulder internal rotation E Forearm pronation F Forearm supination
Added by Edward Peter T.
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This nerve is responsible for innervating the muscles of the anterior compartment of the arm, which are primarily responsible for flexion at the elbow and supination of the forearm. Show more…
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