Triceps
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The triceps, or triceps brachii, is a large muscle on the back of the upper limb of many vertebrates. It consists of three parts: the medial, lateral, and long head. All three heads cross the elbow jo
Right-sided triceps brachii seen from behind. (After Testut's Anatony.)
Drawing of the right-sided triceps brachii, depicting its three heads; posterior view. 1, Lateral head. — 2, Long or scapular head. — 3, Medial or short head. — 4, Olecranon (ulna). — 5, Radius. — 6, Capsular ligament of the shoulder joint. (After Hughes.)
Horizontal section of upper arm. Triceps muscle is shown in green text
Anconeus muscle
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The anconeus muscle is a small triangular muscle placed behind and below the elbow joint, and seems to be continuous by its upper margin with the lateral part of the triceps.
Forearm posterior view
Anconeus muscle
Anconeus muscle
Muscles of upper limb. Cross section.