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Anconeus muscle: Wikis

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Anconeus muscle
Gray1232.png
Back of right upper extremity. (Anconeus labeled at bottom center.)
Musculusanconeus2.png
Posterior surface of the forearm. Superficial muscles. (Anconeus visible at center right.)
Latin musculus anconeus
Gray's subject #125 454
Origin lateral epicondyle of the humerus proximally
Insertion    lateral surface of the olecranon process and the superior part of the posterior ulna distally
Artery deep brachial artery, recurrent interosseous artery
Nerve radial nerve (C7, C8, and T1)
Actions It is partly blended in with the triceps, which it assists in extension of the forearm. It also stabilises the elbow during pronation and supination and pulls slack out of the elbow joint capsule during extention to prevent impingement.

The anconeus muscle (or Anconæus) is a small muscle on the posterior aspect of the elbow joint.

Some consider anconeus to be a continuation of the triceps brachii muscle.[1][2][3] Some sources consider it to be part of the posterior compartment of the arm,[4 ] while others consider it part of the posterior compartment of the forearm.[5]

The Anconeus muscle can easily be palpated just lateral to the olecranon process of the ulna.

Its function is trivial in humans. It assists in extension of the elbow, where the triceps brachii is the principal agonist. It also prevents the elbow joint capsule being pinched in the olecranon fossa during extension of the elbow. Anconeus also abducts the ulna and stabilizes the elbow joint.

Additional images

References

  1. ^ Williams, P. et al., 1995, Gray's Anatomy, 38th ed., Churchill Livingstone
  2. ^ Jones, W. et al.(eds) , 1953, Buchanan's Manual of Anatomy, 8th ed., Balliére, Tindall and Cox., pp. 496
  3. ^ Grant, J. & Basmajian J., 1965, Grant's Method of Anatomy, 7th ed., The Williams & Wilkins Company, Baltimore, pp. 163-164
  4. ^ "Dissector Answers - Axilla & Arm". http://anatomy.med.umich.edu/musculoskeletal_system/axilla_ans.html. Retrieved 2008-01-17.  
  5. ^ "The Radius and Ulna". http://www.med.mun.ca/anatomyts/msk/forearm.htm. Retrieved 2008-01-17.  

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