Anconeus Anatomy

Anconeus Muscle

Origin:  Posterior surface of the lateral epicondyle of the humerus
Insertion: Lateral aspect of the olecranon, extending to the lateral part of the ulnar body
Actions: Extension of the forearm at the elbow
Innervation: Radial nerve (C7 C8)
Blood Supply: Profunda brachii artery from the brachial artery

Primary Actions of the Anconeus

Due to its small size, the anconeus does not have any primary actions.


Secondary Actions of the Anconeus

1. Extension of the forearm at the elbow


  • Triceps Brachii


  • Brachialis
  • Biceps Brachii

Anconeus is a weak extensor of the elbow, but acts primarily to pull the synovium of the elbow joint out of the joint line during extension of the elbow.