The jaw muscle is a group of muscles known as the masticatory muscles that are responsible for the movement of the lower jaw. These muscles enable us to chew, speak, and yawn. The jaw muscle is composed of four main muscles: the temporalis, masseter, medial pterygoid, and lateral pterygoid.
Temporalis Muscle
The temporalis muscle is the largest and strongest of the jaw muscles and is located in the temple area of the head. This muscle helps to close the jaw and aid in chewing. It is also responsible for elevating the mandible or lower jaw.
Masseter Muscle
The masseter muscle is located on the sides of the face and is responsible for closing the jaw and playing a role in chewing. This muscle is composed of three layers and helps to support the lower jaw.
Medial Pterygoid Muscle
The medial pterygoid muscle is located near the masseter muscle and helps to open the jaw. This muscle also assists with chewing and lateral movement of the lower jaw.
Lateral Pterygoid Muscle
The lateral pterygoid muscle is located near the medial pterygoid muscle and helps to move the lower jaw from side to side. This muscle also aids in chewing and opening the jaw.
These four muscles work together to allow us to move our lower jaw. This enables us to chew, speak, and yawn. Without these muscles, we would not be able to move our lower jaw properly.
