2023年10月30日 · 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 …

2024年5月27日 · At its origin point, a portion of the medial head is attached to the intermuscular septum, which keeps the arm’s anterior and posterior compartments separate. 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.

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. [1]

Origin: Long head: infraglenoid tubercle of scapula; Lateral head: posterior surface of humerus, superior to radial groove; Medial head: posterior surface of humerus, inferior to radial groove Insertion: Proximal end of olecranon process of ulna and fascia of forearm Action: Chief extensor of forearm; long head steadies head of abducted humerus

The triceps brachii muscle contributes to pain in the shoulder, elbow, arm, and hand. Muscle anatomy of the triceps brachii includes origin, insertion, action, innervation and vascular supply. Actions include agonists and antagonists for each movement.

2023年8月28日 · Long head —The origin of the long head is the infra-glenoid tubercle of the scapula. Because it attaches to the scapula, the long head not only extends the elbow but will also have a small action on the glenohumeral or shoulder joint. With the arm adducted, the triceps muscle acts to hold the head of the humerus in the glenoid cavity.

2023年4月19日 · The triceps brachii is a muscle in the posterior compartment of the upper arm. It is a large horseshoe-shaped muscle, which forms the majority of the muscle bulk of the upper arm. Attachments: Long head originates from the infraglenoid tubercle of the scapula. Lateral head originates from the humerus (superior to the radial groove).

Quick Facts Origin: Posterior surface of humerus and infraglenoid tubercle of scapula. Insertion: Olecranon process of ulna and adjacent antebrachial fascia. Action: Extends forearm at elbow …

2021年12月14日 · 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.

2016年6月24日 · Origin of triceps brachii The long head originates at the infraglenoid tubercle of the scapula. The lateral head originates on the posterior surface of the humerus above a bony ridge called the spiral groove. The medial head also originates on the posterior surface of the humerus, but attaches below the spiral groove. Insertion of triceps brachii