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Platysma muscle

In this article, we will discuss about the Platysma muscle. So, let’s get started.

Platysma muscle

It originates from the fascia covering the pectoralis and deltoid muscle and from the supra and infraclavicular region and gets inserted into the base of mandible, angle of mouth, skin and subcutaneous tissue of lower part of the face (skin of the cheek and lower lip), and margin of the orbicularis oris muscle. It is innervated by the facial nerve and artery supply is through the branches of the submental and suprascapular artery. Its chief action is depression of the lower jaw, depression of the lower lip and angle of the mouth, also play a minor role in the depression of the lip, and draws the skin of the neck superiorly when the teeth are clenched. The platysma is a vulnerable muscle for strains and tears post neck injury.

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