Platysma muscle

Last revised by Dr Daniel J Bell on 17 Nov 2021

The platysma muscle (a.k.a. the shaving muscle) is a broad superficial fascial sheet of thin muscle covering the superior anterior chest, anterior and anterolateral neck and anterolateral mandibular region.

The muscle consists of three parts: pars mandibularis, pars labialis and pars modiolaris.

  • tenses the skin between the jaw and lateral neck
  • assists in lowering the mandible

 

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