Mnemonic

Platysma Muscle Direction and Action

Mnemonic for the course and action of platysma.

Anatomy Head and Neck

Expansion

Runs from the chest to the jaw, tenses the neck like a drawn up shawl

Expansion

Origin - fascia over the upper chest
Insertion - lower border of the mandible and skin of the lower face
Action - tenses the neck skin, draws the mouth corners down