A 34-year-old man comes to the physician for a 1-week history of difficulty with his right hand movement. Physical examination shows his right hand (B) contrasts with a healthy person (A) shown below. He works in construction and frequently runs, swims, and bikes for triathlon events. Which of the following is the most likely explanation for this patient’s findings?
Diminution of median nerve function at the elbow
Diminution of median nerve function at the wrist
Deficiency of musculocutaneous nerve function
Diminution of radial nerve function in the forearm
Diminution of ulnar nerve function at the wrist
