Anconeus

Anconeus

The structure indicated is the anconeus muscle of the forearm.

The anconeus muscle is one of the muscles of the posterior compartment of the forearm. The posterior compartment consists of a superficial layer of muscles comprised of 7 muscles. The deep layer is comprised of 5 muscles.

Origin: lateral epicondyle of humerus

Insertion: olecranon, proximal surface of ulna

Innervation: Radial nerve

Action: assists elbow extension, stabilises the elbow joint, abducts ulna during pronation

Learn about the muscles of the forearm in this tutorial.