Which of the Following is Least Related to the Platysma

Question

Which of the following is least related to the platysma?
A) Pouting muscle
B) Squinting
C) Inserts on the mandible
D) "Close your mouth," says the dentist

Accepted Answer

The platysma muscle is a thin, broad sheet of muscle that extends from the collarbone and shoulder up to the lower jaw and mouth. It is involved in actions such as pouting (A) and closing the mouth (D), as it helps to depress the lower lip and lower jaw. The platysma also inserts onto the mandible (C). However, the muscle is not directly involved in squinting, which is primarily controlled by the orbicularis oculi muscle.