Name

Supinator

Pronunciation

(soo-pi-NA-tur)

Origin/Proximal Attachment

Lateral epicondyle of humerusSupinator crest of ulnaRadial collateral ligament4. Annular ligament5. Antebrachial fascia

Insertion/Distal Attachment

Proximal portion of anterolateral surface of the radius

Action/Relevance

Supinates the forearm

Innervation

Radial nerve - deep branch (C6)