Anconeus muscle

Last revised by Calum Worsley on 11 Nov 2023

The anconeus muscle is a small muscle in the posterior compartment of the arm at the lateral aspect of the elbow. Its functional significance is not well understood 5.

It should not be confused with the anconeus epitrochlearis, an accessory muscle that is present in up to one third of people, and may be implicated in some cases of cubital tunnel syndrome 4.

Summary

Related pathology

In chronic cases of lateral epicondylitis (tennis elbow) increased signal intensity of the nearby anconeus muscle may be an associated finding. 

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Cases and figures

  • Figure 1: posterior elbow
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  • Figure 2: posterior elbow
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  • Case 1: normal anconeus muscle
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