APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -The triceps brachii is a large, thick muscle on the dorsal part of the upper arm. It often appears in the shape of a horseshoe on the posterior aspect of the arm. The primary function of the triceps is the extension of the elbow joint.

Detailed explanation-2: -The triceps brachii muscle is the primary extensor of the elbow joint and the anconeus muscle assists for extension of the elbow joint (Fig.

Detailed explanation-3: -The triceps, or triceps brachii (Latin for “three-headed muscle of the arm"), is a large muscle on the back of the upper limb of many vertebrates. It consists of 3 parts: the medial, lateral, and long head. It is the muscle principally responsible for extension of the elbow joint (straightening of the arm).

Detailed explanation-4: -The superior portion of the long head of triceps is covered by the posterior border of the deltoid muscle. The long head of triceps can be palpated as an elevation parallel and medial to the posterior border of the deltoid muscle when the elbow is extended.

Detailed explanation-5: -Conclusions. Each head of the triceps brachii has a different pattern of force and activity during different shoulder elevations. The long head contributes to elbow extension more at shoulder elevation and the medial head takes over at 90° and above of shoulder elevation.