pronator quadratus muscle

pro·na·tor quad·ra·tus mus·cle

(prō-nā'tōr kwa-drat'ŭs mŭs'ĕl)

Origin, distal fourth of anterior surface of ulna; insertion, distal fourth of anterior surface of radius; action, pronates forearm; nerve supply, anterior interosseous.
Synonym(s): musculus pronator quadratus [TA] .