Supinator

• O (origin):

  • Supinator crest of ulna
  • Radial collateral ligament and annular ligament
  • Inferior aspect of lateral epicondyle of humerus

  A) Supinator

  
• R (direction):

  • Downwards & laterally

  A) Supinator

  
• I (insertion):

  • Upper 1/3 radius on posterior, lateral & anterior aspects of radius (to the attachment of pronator teres)

  A) Supinator

  
• A (actions):

  • Supination (anterolateral swing of distal end of radius around the ulna – nonpowerful)

  A) Supinator

  
• NS (nerve supply):

  • Radial nerve (C5 - T1)

  A) Supinator