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Review Question - QID 219445

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QID 219445 (Type "219445" in App Search)
A 36-year-old male jiu-jitsu practitioner presents to your clinic with complaints of numbness in his thumb, index, and middle fingers. He says that the pain is worse after intense training sessions, an activity that requires repetitive forearm pronation and supination. On physical examination, the patient has a negative Tinel's sign at the wrist. Which of the following is the innervation of the structure that is the most likely source of this patient's symptoms?