Name
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)