Name
Pronunciation
(ang-KO-ne-us)
Origin/Proximal Attachment
Posterior surface of the lateral epicondyle of the humerus
Insertion/Distal Attachment
Lateral surface of the olecranon process of the ulna, extending to the lateral part of the ulnar
Action/Relevance
Extends forearm at the elbowSupports elbow in full extension
Innervation
Radial nerve (C7, 8,T1)
Notes
Anconeus is a small muscle that is situated posterior to the elbow joint. Triangular in shape, it originates from the posterior surface of the lateral epicondyle of the humerus. It inserts into the lateral side of the olecranon and the proximal posterior third of the shaft of the ulna. On route, anconeus is partly continuous with triceps. It is superficial to the annular ligament.