MuscleForearm — anterior (deep)
Pronator quadratus
Latin: M. pronator quadratus
Location: Forearm
View the pronator quadratus in 3DOrigin
Distal quarter of the anterior ulna.
Insertion
Distal quarter of the anterior radius.
Action
Pronates the forearm and binds the distal radio-ulnar joints together during weight-bearing.
Nerve supply
Anterior interosseous nerve (C7–C8).
Blood supply
Anterior interosseous artery.
Clinical relevance
Distal radial fractures disrupt its holding effect, letting the radius shorten; its location deep in the distal forearm hides its tears from plain examination.
Educational anatomy reference, not medical advice. About this content.