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M. pronator quadratus
der einköthe single-headed pronator of the forearm. In addition to this, there is also the pronator teres as the pronator.
Origin: distal quarter of the palmar surface of the ulna
Attachment: distal quarter of the palmar surface of the radius
Innervation: Nervus interosseus anterior from Nervus medianus from Plexus brachialis from C6-C8 und Th1
Antagonists:
Movement: Pronation forearm