in hands in which the superficial flexors of the fingers and thenar muscles of opposition are denervated , usually as the result of high median-nerve or brachial plexus injury , thumb opposition can be restored by transfer of the superficial flexor of the ring finger to the thumb through a dynamic pulley made from the distal segment of flexor carpi ulnaris which is attached to the proximal segment of flexor carpi ulnaris to the transferred paralyzed superficial ring-finger flexor tendon .
C0018563
hands
C0040067
thumb