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The triceps brachii muscle consists of a long, medial and lateral head, that originate from their respective attachments on the humerus and scapula, and insert via a common tendon on the ulna. The main function of triceps brachii is extension of the forearm at the elbow joint.
The main function of the triceps is to extend the forearm at the elbow joint to straighten the elbow. Extension, or straightening, of the elbow is a necessary everyday movement needed for reaching, getting dressed, and pushing off from armrests to stand up from a chair.
Function. The triceps is an extensor muscle of the elbow joint and an antagonist of the biceps and brachialis muscles. It can also fixate the elbow joint when the forearm and hand are used for fine movements, e.g., when writing.
The triceps brachii is a large, thick muscle on the dorsal part of the upper arm. It often appears as the shape of a horseshoe on the posterior aspect of the arm. The main function of the triceps is the extension of the elbow joint.
The triceps run along the humerus (the main bone of the upper arm) between the shoulder and the elbow. Along with the biceps, it enables extension and retraction of the forearm.
The primary function of the triceps brachii is the extension of the forearm at the elbow joint. When the triceps contract, the elbow straightens, and the forearm extends. Similarly, when the triceps extend, the biceps contract to fold the arm at the elbow.
triceps muscle, any muscle with three heads, or points of origin, particularly the large extensor along the back of the upper arm in humans. It originates just below the socket of the scapula (shoulder blade) and at two distinct areas of the humerus, the bone of the upper arm.
The primary function of the triceps is the extension of the elbow joint. It is composed of three heads (tri = three, cep = head): a long head, a lateral head, and a medial head. The tendons all have different origins, but the three heads combine to form a single tendon distally.
Function: Extension of the arm at the elbow. Innervation: Radial nerve. A tap on the triceps tendon tests spinal segment C7. Note: In some individuals, the long head of the triceps brachii is innervated by the axillary nerve.
The triceps brachii muscle is the only muscle in the posterior compartment of the arm. It consists of three heads: lateral, medial and long head and serves primarily to extend the forearm. Learn more about the anatomy of the triceps brachii using the narrated video tutorial and interactive 3D anatomy model.