Back of right upper extremity. (Anconeus labeled at bottom center.)
Posterior surface of the forearm. Superficial muscles. (Anconeus visible at center right.)
|Origin||lateral epicondyle of the humerus proximally|
|Insertion||lateral surface of the olecranon process of the radial and the superior proximal part of the posterior ulna|
|Artery||deep brachial artery, recurrent interosseous artery|
|Nerve||radial nerve (C5, C6, C7, C8, and T1)|
|Actions||It is partly blended in with the triceps, which it assists in extension of the forearm. It also stabilizes the elbow during pronation and supination and pulls slack out of the elbow joint capsule during extension to prevent impingement.|
|Latin||Musculus anconeus, |
|Anatomical terms of muscle|
Some consider anconeus to be a continuation of the triceps brachii muscle. Some sources consider it to be part of the posterior compartment of the arm, while others consider it part of the posterior compartment of the forearm.
The anconeus muscle can easily be palpated just lateral to the olecranon process of the ulna.