Anconeus Anatomy

Supinator Muscle

Origin:  Lateral epicondyle of the humerus, the radial collateral ligament, the supinator crest of the ulna, and the radial collateral and annular ligaments
Insertion: Proximal portion of the anterolateral surface of the radius
Actions: Supination of the forearm
Innervation: Radial nerve (C6, C7, C8)
Blood Supply: Radial recurrent artery from the radial artery

Primary Actions of the Supinator

1. Supination of the forearm

  Agonists: Biceps Brachii


  • Pronator Teres
  • Pronator Quadratus