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Human Anatomy: Muscle Groups


Human Anatomy



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Muscle Function & Other Pertinent Medical Information
- PLATYSMA -
ORIGIN: Skin over lower neck and upper lateral chest
INSERTION: Inferior border of mandible and skin over lower face and angle of mouth
ACTION: Depresses and wrinkles skin of lower face and mouth. Assists forced depression of mandible
NERVE: Cervical branch of facial nerve (VII)













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