Deltoid Muscle Biceps Brachii Brachioradialis Muscle Palmaris Longus Muscle Extensor Carpi Radialis Longus Muscle Extensor Retinaculum Dorsal Interossei Muscle Extensor Carpi Ulnaris Muscle Extensor Digitorum Communis Muscle Extensor Carpi Radialis Brevis Muscle Triceps Brachii Muscle Biceps Brachii Muscle Posterior Brachialis Muscle

Extensor Carpi Ulnaris Muscle

STRUCTURE AND POSITION :

Extensor Carpi Ulnaris is a skeletal muscle of the Extensor Compartment of the Forearm hence located on the dorsal aspect of the Forearm.
Extensor Carpi Ulnaris is a long muscle. It has two heads of Origin, an Ulnar and a Humeral Head.

ATTACHMENTS :

Extensor Carpi Ulnaris has two origins and one insertion.

Origin : Extensor Carpi Ulnaris arises from the Common Extensor Tendon at Lateral Epicondyle of the Humerus and from the posterior border of Ulna.
It runs downwards and medially over the medial aspect of the Forearm.
Insertion : Extensor Carpi Ulnaris is attached to the medial side of the base of the 5th Metacarpal at its distal end.

BLOOD SUPPLY :

Extensor Carpi Ulnaris receives its blood supply from Posterior Interosseous Artery and its recurrent Interosseous branch.

NERVE SUPPLY :

Extensor Carpi Ulnaris is innervated by the Radial Nerve.

ACTION :

Extensor Carpi Ulnaris extends and adducts the Wrist joint.

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