Triceps Brachii

Triceps Brachii

Origin:

  • Long head: infraglenoid tubercle of the scapula
  • Lateral head: upper half of posterior surface of humerus
  • Medial head: posterior shaft of humerus

Insertion: Posterior surface of the olecranon process of the ulna

Action: Adducts the arm (long), Extends the forearm

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