The left hand drawn with the relevant structures at the proximal hand and distal forearm. The median nerve (M) becomes more superficial as it approaches the distal one third of the forearm, but still deep to both the palmaris longus tendon (P.L.) and the flexor carpi radialis (F.C.R.). As the median nerve continues distally into the hand, it enters the carpal tunnel. The roof of the carpal tunnel is formed by the transverse carpal retinaculum (T.C.L). The recurrent branch (Rb) generally emerges at the distal edge of the transverse carpal ligament. Occasionally, it will emerge through the fibers of the ligament. The median nerve continues through the proximal hand and then divides into its digital sensory branches.