Arm Pain and Weakness - Case Report

A 35-year-old professional baseball player presents with weakness in his right arm. Upon examination, you notice a significant atrophy in his biceps brachii muscle. He struggles to flex his elbow and supinate his forearm and reports a diminished sensation on the lateral side of his forearm. Which nerve is likely affected in this patient?

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[dohyunkim]

Thank you for the great concise and educational video!