Anconeus - Muscle Physiology & Functional Anatomy


Anconeus Muscle




  • Lateral epicondyle of the humerus proximally (smooth surface at lower extremity of posterior aspect of lateral epicondyle)


  • Lateral surface of the olecranon process (and the superior part of the posterior ulna distally)

Major Arteries:

  • Deep brachial artery

  • Recurrent interosseous artery


Neural Innervation:

  • Radial nerve (C7-C8)


Trigger Points: 

Anconeus Trigger Points




Concentric Functions:

  • Extends the elbow (weak)

  • Abducts (moves) ulna in pronation

Eccentric Functions:

  • Helps stabilize the elbow joint

Isometric Function:

  • Helps stabilize the elbow joint

Related Muscles





More Images of the Anconeus Muscle

More Information about the Anconeus Muscle

The anconeus muscle is a small muscle on the posterior aspect of the elbow joint.  While some consider the antonius to be a continuation of the triceps brachii, some consider it to be part of the posterior compartment of the arm or forearm.

In addition to being a weak extensor of the elbow the anconeus muscle prevents the elbow joint capsule being pinched in the olecranon fossa during extension of the elbow.


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