Palmaris Longus

hand-muscles-anterior-carpal-tunnel-labeledMuscle Origin

Medial epicondyle of humerus to flexor retinaculum (palmar aponeurosis).

The medial epicondyle of the humerus in humans is larger and more prominent than the lateral epicondyle and is directed slightly more posteriorly in the anatomical position. Wiki


Palmar aponeurosis.

The palmar aponeurosis (palmar fascia) invests the muscles of the palm, and consists of central, lateral, and medial portions. The palmar aponeurosis is a strong, triangular membrane overlying the tendons in the palm.


Flexes wrist.

Innervation – Nerve control

Median nerve.

The median nerve is a nerve in humans and other animals in the upper limb. It is one of the five main nerves originating from the brachial plexus. The median nerve originates from the lateral and medial cords of the brachial plexus, and has contributions from ventral roots of C5-C7(lateral cord) and C8 & T1 (medial cord). Wiki


The ulnar artery is the main blood vessel, with oxygenated blood, of the medial aspect of the forearm. It arises from the brachial artery and terminates in the superficial palmar arch, which joins with the superficial branch of the radial artery. It is palpable on the anterior and medial aspect of the wrist. Wiki

Antagonist muscles

Extensor carpi radialis brevis, Extensor carpi radialis longus, Extensor carpi ulnaris.

Pictures of muscles


Trigger Point Referrals


Stretching description








Additional Resources
Sports Lab
American Academy of Manual Medicine

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