A 32-year-old man comes to the office complaining of left arm weakness. The patient had a humerus fracture two months ago. Since his fracture, the patient has had difficulty elevating his arm. Physical examination shows decreased sensation over is at the left upper arm, with deltoid atrophy. Additionally, the patient has weakness in arm abduction. The patient has a most likely injury in which of the following nerves?

Question

Quizplus · Accepted Answer

Eductional Objective: The axillary nerve is derived from the posterior cord of the brachial plexus. Axillary nerve injury presents with sensory loss over the deltoid area in the upper arm and deltoid muscle weakness.

A 32-Year-Old Man Comes to the Office Complaining of Left