Triceps Brachii

Right scapula and humerus, posterior view, triceps brachii heads highlighted.The triceps brachii is located on the posterior of the humerus and is the primary extensor of the arm.

The triceps brachii has three heads:

  • The lateral head (green) arises from the posterior of the humerus near the shoulder.
  • The medial head (yellow) arises from lower half of the posterior of the humerus.
  • The long head (blue) arises from the scapula.

The three heads come together in a single tendon that inserts into the olecranon of the ulna.