yogabook / muscles / palmaris brevis
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M. palmaris brevis
presumably in the process of regression, relatively unimportant except in the absence of palmaris longus
Origin: palmar aponeurosis and retinaculum mm. Flexorum
Attachment: Skin of the ulnar edge of the hand
Innervation: Ramus superficialis of nervus ulnaris from Plexus brachialis from C8 and Th1
Antagonists:
Movement: tensions the palmar aponeurosis