Name

# Anconeus

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.