Muscle Atlas

Pronator Quadratus

Origin: Distal 1/4 of anterior surface of ulna
Insertion: Distal 1/4 of anterior surface of radius
Action: Pronates forearm; deep fibers bind radius and ulna together
Innervation: Anterior interosseous nerve from median nerve (C8 and T1)
Arterial Supply: Anterior interosseous artery

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