140ms
Updated: 12/26/2021

Triceps Brachii

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  • Summary
      • Triceps Brachii
      • 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, C8)
      • Arterial supply
      • Branches of deep brachial artery

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