Hi!
If you were alternately contracting and relaxing your masseter muscle, you would be performing a chewing motion, as the masseter muscle is one of the main muscles used in mastication (chewing).
Three other muscles of the face, along with their location and function, are:
1. Orbicularis oris muscle: This muscle is located around the mouth and is responsible for puckering the lips, closing the mouth, and controlling facial expressions.
2. Frontalis muscle: This muscle is located in the forehead and is responsible for raising the eyebrows and wrinkling the forehead.
3. Zygomaticus major muscle: This muscle is located in the cheek and is responsible for raising the corners of the mouth, producing a smile, and assisting in facial expressions of happiness and joy.
Overall, the muscles of the face are responsible for producing a wide range of facial expressions and movements, including smiling, frowning, blinking, and chewing. The coordinated activity of these muscles is controlled by the facial nerve (cranial nerve VII) and allows us to communicate our emotions and intentions to others.
Have a great day!