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The anconeus (Latin: musculus anconeus) is a small, pyramidal-shaped muscle of the upper limb. It stretches between the distal humerus and proximal ulna. The anconeus is located in the posterior compartment of the upper arm together with the triceps brachii muscle. It is one of the forearm extensors.

Upper arm muscles, Biceps brachii, Triceps brachii, Brachialis, Anconeus, Upper extremity, Muscles
Muscles of upper arm by Anatomy Next
OriginLateral epicondyle of humerus
Insertion Proximal end of ulna, lateral surface of olecranon
Action Extension of forearm
InnervationRadial nerve (C7 - C8)
Blood supply Posterior interosseous artery



The anconeus muscle originates from the lateral epicondyle of the humerus.

Anconeus, Origin of anconeus, Insertion of anconeus, Muscles of upper limb, Muscles of upper arm, Posterior compartment muscles, Posterior compartment muscles of upper arm, Arm muscles
Origin and insertion of anconeus by Anatomy Next



The anconeus inserts on the proximal end of the ulna and lateral surface of the olecranon.



The primary function of the anconeus muscle is the extension of the forearm at the elbow joint.



The anconeus is innervated by the radial nerve (C7 - C8) - a branch of the brachial plexus.


Blood supply

The anconeus muscle receives arterial blood supply from the posterior interosseous artery that is a branch of the common interosseous artery.