Updated: 10/19/2017

Triceps Brachii

Review Topic
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
Innervation Radial nerve (C6, C7 and C8) (C6, C7, C8)
Arterial Supply Branches of deep brachial artery




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