Anatomy - Triceps brachii muscle
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Triceps brachii - Action
All heads- extension of the elbow, Long head- extension, adduction, and horizontal abduction of the shoulder joint
Triceps brachii - Origin
Long head- infraglenoid tubercle below inferior lip of glenoid fossa of the scapula, Lateral head- upper half of the posterior surface of the humerus, Medial head- distal two-thirds of the posterior surface of the humerus
Triceps brachii - Insertion
Olecranon process of the ulna
Triceps brachii - Innervation
Radial nerve (C7, C8)
