GROSS ANATOMY

Detailed explanation-1: -The platysma is responsible for drawing the skin around the lower part of your mouth down or out, which creases the skin in your lower face, according to the Loyola University Medical Education Network.

Detailed explanation-2: -Due to its attachment on the mandible, the platysma can also assist in depressing the mandible and therefore help to open the mouth.

Detailed explanation-3: -The platysma muscle is a superficial muscle of the human neck that overlaps the sternocleidomastoid. It covers the anterior surface of the neck superficially. When it contracts, it produces a slight wrinkling of the neck, and a “bowstring” effect on either side of the neck.

Detailed explanation-4: -The platysma, innervated by the facial nerve, is a thin, sheet-like voluntary muscle. Origin: the muscle has a broad origin with fibers arising from the fascia of the upper thorax including the clavicle, acromial region, pectoralis major and deltoid muscles.