It ascends to the interval between the lateral epicondyle and olecranon, on or through the fibers of the supinator but beneath the anconeus.
Some consider anconeus to be a continuation of the triceps brachii muscle.
Harm inflicted upon the radial nerve through these mechanisms can paralyze the anconeus muscle as well as other extensors of the elbow and wrist.
The triceps brachii and anconeus extend the elbow, and attach to the posterior side of the humerus.
The somatomotor portion of radial nerve innervating anconeus bifurcates from the main branch in the radial groove of the humerus.
If the lesion is high up, as it is, for example, in crutch paralysis, the triceps and anconeus may also suffer.
