We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.
Health

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

What Are the Mandibular Muscles?

By A.M. Boyle
Updated: May 17, 2024
Views: 15,646
Share

The mandible is the lower part of the jaw that moves. The jaw works as a hinge mechanism and has a network of mandibular muscles that help it to function properly. Primarily, the mandibular muscles on the sides of the jaw consist of masseter muscles, the temporalis muscles, and the pterygoid muscles. The muscles underneath the mandible include the digastrics, the geniohyoid, and the mylohyoid.

The masseters are mandibular muscles that function to close the lower jaw. There is a masseter muscle located on either side of the jaw. Aside from functioning to close the lower jaw, these muscles assist with chewing and grinding motions. They also function to retract the jaw, pulling it back when needed. Due to the fact that these muscles are so intricately involved in the grinding motion of the jaw, they can easily become tender and inflamed in individuals who have difficulty with conditions such as bruxism, where a person excessively grinds or clenches his or her teeth.

Along the sides of the face, two broad muscles extend from the sides of the jaw to the temple region. These mandibular muscles, called the temporalis muscles, have the shape of a semicircle and take up a good deal of space on the sides of the head. The temporalis muscles function with the masseter muscles to close the lower jaw and pull the jaw back. They also help with the crushing and grinding of food. As a result of the location of these muscles along the sides of the head, when a person experiences jaw pain or inadvertently eats something that is unusually hard or crunchy, he or she might experience headache-type pain as well.

Next to the masseter muscles, along the sides of the cheeks, the pterygoid muscles can be found. These muscles are split into the lateral pterygoids and the medial pterygoids. The lateral pterygoids serve to open the jaw, while the medial pterygoids work along with the masseter and the temporalis mandibular muscles to close the jaw. These particular muscles also assist with the side-to-side motion of the jaw. The pterygoid muscles are attached from the jaw to a point close to the eye sockets, so consequently, if one of these muscles becomes injured or inflamed, a person might experience eye pain in addition to jaw pain.

There are other mandibular muscles located under the chin. The geniohyoid and mylohyoid muscles function to open the lower the jaw. The digastric muscles, also found under the chin, are divided into anterior digastric and posterior digastric. Both of these muscles serve to lift the mandible when necessary. The position of the jaw and other muscles determine which of the digastric muscles will act to lift the mandible.

Share
WiseGeek is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.

Editors' Picks

Discussion Comments
Share
https://www.wisegeek.net/what-are-the-mandibular-muscles.htm
Copy this link
WiseGeek, in your inbox

Our latest articles, guides, and more, delivered daily.

WiseGeek, in your inbox

Our latest articles, guides, and more, delivered daily.