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M. palmaris longus

Palmar flexor of the wrist
Origin: Epicondylus medialis humeri and forearm fascia Fascia antebrachii
Attachment: Aponeurosis palmaris and retinaculum flexorum
Innervation: Nervus medianus from Plexus brachialis from C7,C8
Antagonists:
Movement: Tensioning of the palmar aponeurosis, palmar flexion of the wrist, weak flexion of the elbow joint