Etymology: L, pronare, to bend forward; Gk, syn, together, dromos, course
the compression of the median nerve in the forearm between the two heads of the pronator teres muscle.
pronator syndrome, Pronator teres syndrome
A neurological disorder caused by entrapment of the median nerve at the elbow. Symptoms and signs include aching in the wrist with a subjective feeling of poor coordination; paresthesias extending into the hand; paresis of the thumb muscles; pain on pronation of the forearm and flexion of the wrist against resistance; and tenderness in the proximal thenar muscles. A positive Tinel's sign over the pronator teres muscles may be present. The disease usually affects the dominant arm in men. The condition may be treated with corticosteroid injections or orthopedic surgery.