Epitrochleoanconeus muscle

The epitrochleoanconeus muscle (anconeous epitrochlearis muscle, anconeus-epitrochlearis or anconeus sextus) is a small accessory muscle of the arm which runs from the back of the inner condyle of the humerus over the ulnar nerve to the olecranon. The average prevalence of this muscle is 14.2% in healthy individuals.

Epitrochleoanconeus muscle
The inner side of the right elbow showing the epitrochleoanconeus muscle. From Toldt (1919).
Illustration of a dissected elbow joint showing ulnar nerve (a), epitrochleoanconeus (1 in red), triceps extensor cubiti (2) and flexor carpi ulnaris muscles (3). From Gruber (1866).
Details
OriginInferior surface of the medial epicondyle of the humerus
Insertionolecranon process
NerveUlnar nerve
Identifiers
LatinMusculus epitrochleoanconaeus
Anatomical terms of muscle
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