The supinator muscle is supplied by

SupinatorOrigin1.Lateral epicondyle of the humerus. 2.Radial collateral ligament of the elbow joint. 3.Annular ligament. 4.Supinator crest of the ulna, and the posterior pa of the triangular area in front of it.Inseion: Upper one-third of the lateral surface of the radius.Nerve Supply: Posterior interosseous nerve (C6, C7).Action: Supination of the forearm.Note: The muscles have two layers, superficial and deep. The posterior interosseous nerve runs downwards between these layers.Ref: BD Chaurasia; Volume 1; 6th edition; Page no: 133