What is the muscle that extends from the upper part of the shoulder to the corner of the mouth that is massaged during a facial called?

The muscle that extends from the upper part of the shoulder to the corner of the mouth and is commonly massaged during a facial is the platysma. This broad, thin muscle plays a role in facial expressions and also helps in movements of the jaw and neck.

During facials, the platysma is important to address because it can show signs of tension and stress, which may affect the overall appearance of the face. By massaging the platysma, one can promote relaxation, improve circulation, and enhance the skin's appearance.

The other muscles listed serve different functions. The temporalis is primarily involved in the chewing process, while the orbicularis oris encircles the mouth and is responsible for movements like puckering. The masseter is another key chewing muscle situated near the jaw. Each of these has distinct roles, making the platysma the correct response in this context, as it is specifically related to the areas massaged during facial treatments.