Anconeus muscle

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Forearm posterior view

== Anconeus muscle ==

The Anconeus muscle is a small muscle located on the posterior aspect of the elbow joint. It is considered to be a continuation of the triceps brachii muscle and plays a role in the extension of the forearm.

Anatomy

The Anconeus muscle originates from the lateral epicondyle of the humerus and inserts into the lateral aspect of the olecranon and the upper part of the posterior surface of the ulna. It is innervated by the radial nerve, specifically by the branch to the anconeus, which is derived from the C7 and C8 nerve roots.

Function

The primary function of the Anconeus muscle is to assist the triceps brachii in the extension of the forearm at the elbow joint. Additionally, it helps stabilize the elbow joint and may assist in the abduction of the ulna during pronation of the forearm.

Blood Supply

The Anconeus muscle receives its blood supply from the recurrent interosseous artery, a branch of the posterior interosseous artery.

Clinical Significance

Injury or strain to the Anconeus muscle can result in pain and limited movement of the elbow. It is often involved in conditions such as lateral epicondylitis (tennis elbow) due to its proximity to the lateral epicondyle of the humerus.

Related Pages

• Triceps brachii muscle
• Elbow joint
• Radial nerve
• Lateral epicondylitis
• Ulna
• Humerus