Platysma 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.

  • origin: the fascia of pectoralis major and deltoid muscles
  • insertion: lower border of the mandible, the lower lip, and subcutaneous tissue of the lower face
  • tenses the skin between the jaw and lateral neck
  • assists in lowering the mandible

Head and neck anatomy
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Article information

rID: 48433
System: Head & Neck
Section: Anatomy
Synonyms or Alternate Spellings:

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