The anconeus muscle is a small muscle on the posterior surface of the elbow. There are suggestions that this muscle is embryologically the fourth head of the triceps brachii muscle. The limbs are derived from embryologically similar origins and since the lower limb muscle quadriceps femoris muscle has four heads, it would seem to make sense. A top-down view of skeletal muscle Muscle is a contractile form of tissue. ... Elbow redirects here. ... ...
Attachments
It runs from the lateral epicondyle of the humerus proximally to the lateral surface of the olecranon process and the superior part of the posterior ulnadistally. The term lateral can refer to: an anatomical definition of direction. ... The humerus is an long bone in the arm or fore-legs (animals) that runs from the shoulder to the elbow. ... Superior has various meanings: A superior is a person who has the authority to command another, as in a superior officer. See: Superior (function) In a hierarchical structure of any kind, a superior is higher in the hierarchy and thus closer to the apex than the subordinate ones. ... The ulna (along with the radius) is one of the two bones in the forearm. ... In zootomy, several terms are used to describe the location of organs and other structures in the body of bilateral animals. ...
Action
It is partly blended in with the triceps, which it assists in extension of the forearm. It also stabilises the elbow and abducts the ulna during pronation. The triceps brachii muscle is a large three-headed skeletal muscle found in humans. ... In community development extension involves the building of community capacity by outsiders. ... The forearm is the structure on the upper limb, between the elbow and the wrist. ... In criminal law, kidnapping is the taking away of a person against the persons will, usually to hold the person in false imprisonment (confinement without legal authority) for ransom or in furtherance of another crime. ...
Innervation
It is supplied (as is triceps) by the radial nerve from spinal roots C7, C8, and T1. The radial nerve is a nerve in the human body, that supplies the arm, the forearm and the hand. ...
The posterolateral approach to the elbow and the proximal radius between extensor carpi ulnaris (ECU) and anconeus is useful for excision of the radial head, reduction and internal fixation of fractures of it and fixation of some distal humeral fractures.
The interval between the ECU and anconeus was identified and opened to expose the underlying supinator muscle.
The proximal fibres of this muscle were then divided with the lateral capsule of the elbow and the annular ligament to expose the head and neck of the radius.
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