Pronator Quaratus Anatomy

Pronator Quadratus Anatomy

Origin:  Distal one-fourth of the anteromedial surface of the ulna.
Insertion:  Distal one-fourth of the anterolateral surface of the radius.
Actions: Pronation of the forearm
Innervation: Anterior interosseous branch of the median nerve (C8, T1)
Blood Supply: Muscular branches from the radial artery and the anterior interosseous artery from the ulnar artery.

Primary Actions of the Pronator Quadratus

1. Pronation of the forearm


  • Pronator teres


  • Supinator
  • Biceps brachii