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PLATYSMA

Platysma muscle

Origin of Platysma

Subcutaneous tissue of infraclavicular and supraclavicular regions.

Insertion of Platysma

Base of mandible; skin of cheek and lower lip; angle of mouth; orbicularis oris.

Muscle Action/Function of Platysma

Draws the corners of the mouth inferiorly and widens it (as in expressions of sadness and fright). Also draws the skin of the neck superiorly when teeth are clenched.

Arterial (Blood) Supply of Platysma

Branches of the Submental artery and Suprascapular artery.
platysma muscle, action, muscle picture

Platysma Video

Platysma muscle
Neck 4853039359750844279

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