Audio LecturePro Feature Anconeus 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The anconeus is a muscle within the superficial compartment of the posterior forearm. Attachments: Originates from the lateral epicondyle of the humerus and attaches to the olecranon of the ulna. Actions: Abduction of the ulna during pronation of the forearm. Weak extensor of the elbow. Innervation: Radial nerve. Blood supply: Profunda brachii artery By TeachMeSeries Ltd (2026) Fig 1The muscles in the superficial layer of the posterior forearm. 3D ModelPro Feature You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Frequent questions What is the anconeus muscle? The anconeus is a muscle located in the superficial compartment of the posterior forearm. It plays a role in forearm movement and assists in elbow extension. What are the attachments of the anconeus muscle? The anconeus originates from the lateral epicondyle of the humerus and inserts at the olecranon of the ulna. These attachments facilitate its function during forearm movements. What actions does the anconeus perform? The anconeus primarily abducts the ulna during forearm pronation and acts as a weak extensor of the elbow. Its actions contribute to the stability and movement of the forearm. Which nerve innervates the anconeus muscle? The anconeus is innervated by the radial nerve. This nerve supply is crucial for the muscle's function in forearm and elbow movements. What is the blood supply of the anconeus muscle? The anconeus receives its blood supply from the profunda brachii artery. This vascularisation supports the muscle's metabolic needs during activity. Rate This Article