A 30-year-old man comes to the office due to left arm pain and weakness. The patient noticed that the pain started after he slept a night while his left arm was underneath his body. After he woke up, the patient felt numbness and tingling in his left arm. Since then, the patient has had difficulty lifting objects using his left arm. The patient has no history of trauma. On examination, the patient has decreased left elbow flexion with diminished biceps reflex. This patient would have sensory loss over which of the following areas?

Question

Quizplus · Accepted Answer

Eductional Objective: The musculocutaneous nerve originates from the lateral cord of the brachial plexus. The motor component supplies arm flexors and coracobrachialis. It provides sensation to the lateral forearm.

A 30-Year-Old Man Comes to the Office Due to Left