Note differences between this and the extensor retinaculum. Remove the antebrachial fascia, leaving the palmar carpal ligament intact. On flexor side of forearm, separate and dissect the various muscular layers. The forearm flexor muscles are arranged in three layers. Dissect each layer separately.
Pronator teres .
Note two heads of origin, relation of median nerve. The tendons of flexor carpi radialis , palmaris longus , and flexor carpi ulnaris lie within the palmar carpal ligament at the wrist. Trace them through the palmar carpal ligament. Note points of insertion on a skeleton, but do not trace the tendons into the palm. This maneuver also reveals the deep head of pronator teres and the course of the median nerve between the two heads.