MOTOR regeneration of the median nerve after transection and repair of the median nerve at the wrist occurs in only about 5 per cent of cases. The thumb is incapable of abduction and opposition with ...
The abductor pollicis brevis muscle is located in the hand between the wrist and the base of the thumb. It originates from the flexor retinaculum and the tubercles of the scaphoid and trapezium bones.