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image: Supinator


 Action :

  • Supinates forearm (i.e., rotates radius to turn palm anteriorly).

Origin :

  • Lateral epicondyle of humerus.
  • Radial collateral and annular ligaments.
  • Supinator fossa and crest of ulna.

Insertion :

  • Lateral, posterior and anterior surfaces of proximal 1/3 of radius.

Innervation :

  • Deep branch of radial nerve (C5 and C6).

Arterial Supply :

  • Recurrent interosseous artery.

Depth :

  • Superficial
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