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http://upload.orthobullets.com/topic/10020/images/triceps-brachii.jpg
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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