Pronator syndrome is a median nerve injury at which region?

• A. Proximal anterior forearm near pronator teres
• B. Carpal tunnel
• C. Between radius and ulna at elbow
• D. Palm

Answer: (B)

Pronator syndrome is a compression of the median nerve in the proximal forearm, where the nerve passes between the two heads of the pronator teres near the elbow. This location makes the forearm painful and can produce median-nerve sensory symptoms in the hand, sometimes with mild motor effects, especially on resisted forearm pronation. The carpal tunnel, by contrast, is a distal compression at the wrist and presents mainly with hand symptoms (numbness, tingling) without forearm pain. So the region involved in pronator syndrome is the proximal forearm between the heads of the pronator teres.