Anconeus

Anatomy

Origin:
Lateral epicondyle of humerus.

Insertion:
Lateral aspect of olecranon of ulna and proximal quarter of posterolateral aspect of ulna.

Key Relations:
One of the six muscles in the deep posterior compartment of the forearm.

Functions

Assists triceps with extension of the forearm at the elbow.

e.g. as in pushing a door closed..

Supply

Nerve Supply:
Radial nerve (C6,C7, C8).

Blood Supply:
-Deep brachial artery,
-Recurrent interosseous artery.

Clinical

Hypertrophy of triceps and anconeus is commonly seen in athletes particularly weightlifters and throwers. In rare cases this hypertrophy can cause a compression of the ulnar nerve, and lead to pain and loss of sensation in the upper limb following the pattern of distribution of the ulnar nerve.

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