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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.
- origin: the fascia of pectoralis major and deltoid muscles
- insertion: lower border of the mandible, the lower lip, modiolus and subcutaneous tissue of the lower face
- tenses the skin between the jaw and lateral neck
- assists in lowering the mandible
- anteriorly: small venous tributaries, often via the submental vein, drain into the superior thyroid vein, anterior jugular vein, or facial vein of the internal jugular vein system 2,3
- posteriorly: external jugular vein 2,3
- cervical branch of the facial nerve
- 1. Gray's Anatomy. Churchill Livingstone. (2011) ISBN:0443066841. Read it at Google Books - Find it at Amazon
- 2. Agarwal A, Schneck CD, Kelley DJ. Venous drainage of the platysma myocutaneous flap. (2004) Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery. 130 (3): 357-9. doi:10.1016/j.otohns.2003.12.005 - Pubmed
- 3. Uehara M, Helman JI, Lillie JH, Brooks SL. Blood supply to the platysma muscle flap: an anatomic study with clinical correlation. (2001) Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons. 59 (6): 642-6. doi:10.1053/joms.2001.23389 - Pubmed