Triceps Brachii Muscle - Long Head
Anconeus Muscle – Attachments, Action & Innervation
Anconeus muscle is a small muscle that is triangular in shape. It’s sometimes blended with triceps brachii or extensor carpi ulnaris.
Attachments of Anconeus Muscle: Origin and Insertion
Origin (proximal attachment)
a. Lateral epicondyle of humerus.
Insertion (distal attachment)
a. Posterior olecranon process of ulna.
Actions of Anconeus on the arm (humerus):
a. Extends the forearm at the elbow.
Nerve to Anconeus muscle and its spinal segment:
Radial nerve (C7, C8).