Ch 2: Muscles of the Mouth

About This Chapter

Refresh your understanding of the muscles of the mouth with the helpful collection of lessons in this chapter. Work at your own pace as you complete these lessons and quizzes, reviewing all the topics you need to know to prepare for a test or catch up after missing class.

Muscles of the Mouth - Chapter Summary

This chapter contains lessons that outline the muscles of the mouth, including the tensor tympani muscle and the depressor anguli oris muscle. You'll learn the definition, origin and function of the muscles of the mouth, including the mentalis muscle. If you've had a hard time understanding these topics, our self-paced and mobile-friendly lessons can help. Feel free to study 24 hours a day to review all you need to know. Our instructors are available to answer any questions you might have. Once this chapter is complete, you should be able to:

  • Highlight the function of and nerve associated with the buccinator muscle
  • Detail the definition and insertion of the orbicularis oris muscle
  • Explain what the risorius muscle does
  • Define the masseter muscle and recognize its origin
  • Discuss the function of and action related to the temporalis muscle
  • Identify the trigger point and discuss insertion as it relates to the lateral pterygoid muscle
  • Describe the function of the medial pterygoid muscle

16 Lessons in Chapter 2: Muscles of the Mouth
Test your knowledge with a 30-question chapter practice test
Tensor Tympani Muscle: Definition, Function & Nerve

1. Tensor Tympani Muscle: Definition, Function & Nerve

The tensor tympani muscle is a small muscle located in the middler ear. In this lesson, learn about the definition, function, and nerve of the tensor tympani muscle.

Depressor Anguli Oris Muscle: Function, Origin & Insertion

2. Depressor Anguli Oris Muscle: Function, Origin & Insertion

The depressor anguli oris muscle can be thought of as a very ''unhappy''' muscle. Be sure to read this lesson to find out why this muscle is an ''unhappy'' muscle!

Mentalis Muscle: Innervation, Origin & Insertion

3. Mentalis Muscle: Innervation, Origin & Insertion

The mentalis muscle is a muscle located in the chin and lower lip area of the face. In this lesson, learn about the innervation, origin, and insertion of the mentalis muscle.

Mentalis Muscle: Definition, Function & Location

4. Mentalis Muscle: Definition, Function & Location

The mentalis muscle is a muscle located between the tip of the chin and the lower lip. In this lesson, learn about the definition, function, and location of the mentalis muscle.

Buccinator Muscle: Function, Origin & Insertion

5. Buccinator Muscle: Function, Origin & Insertion

The buccinator muscle is a muscle located in each cheek of the face. In this lesson, learn about the origin, insertion, and function of the buccinator muscle.

Buccinator Muscle: Definition & Nerve

6. Buccinator Muscle: Definition & Nerve

What is one of the first muscles that humans are able to control? If you said the buccinator, you are right! In this lesson, learn all about the buccinator muscle, including its definition and innervation.

Orbicularis Oris: Definition, Innervation & Function

7. Orbicularis Oris: Definition, Innervation & Function

The orbicularis oris is the muscle that surrounds the mouth and forms the lips. In this lesson, learn the definition, innervation, and function of the orbicularis oris muscle.

Orbicularis Oris: Action, Origin & Insertion

8. Orbicularis Oris: Action, Origin & Insertion

The orbicularis oris is a facial muscle that allows you to perform several different actions with your mouth. To learn all about this amazing muscle, be sure to check out this lesson!

What Does the Risorius Muscle Do? - Definition & Function

9. What Does the Risorius Muscle Do? - Definition & Function

This lesson goes over a little known muscle called risorius. Find out where it's found, what it helps us do on a daily basis, and a little bit more about its anatomy in this lesson.

Masseter Muscle: Definition, Innervation & Function

10. Masseter Muscle: Definition, Innervation & Function

The masseter muscle is a facial muscle located in the cheek area. In this lesson, learn about the definition, innervation, and function of the masseter muscle.

Masseter Muscle: Action, Origin & Insertion

11. Masseter Muscle: Action, Origin & Insertion

The masseter muscle is a facial muscle that is located in the area of the cheek. In this lesson, you'll learn about the action, origin, and insertion of the masseter muscle.

Temporalis Muscle: Definition & Function

12. Temporalis Muscle: Definition & Function

The temporalis muscle is a muscle of the skull located at the side of the head/face near the temples. In this lesson, learn about the definition and function of the temporalis muscle.

Temporalis Muscle: Action, Innervation & Origin

13. Temporalis Muscle: Action, Innervation & Origin

The temporalis muscle is a muscle that is located at the side of the head/skull at each of the temples. In this lesson, learn about the action, innervation, and origin of the temporalis muscle.

Lateral Pterygoid Muscle: Trigger Point & Innervation

14. Lateral Pterygoid Muscle: Trigger Point & Innervation

The lateral pterygoid muscle is one of the muscles of mastication that can often become painful, tender, and stiff. Review this lesson to learn how and why the lateral pterygoid commonly gets these symptoms!

Lateral Pterygoid Muscle: Function, Origin & Insertion

15. Lateral Pterygoid Muscle: Function, Origin & Insertion

Do you like to eat? If you said 'YES' then be sure to check out this lesson on the lateral pterygoid muscle, which is one of the muscles of the skull that allows you to eat your favorite foods.

Medial Pterygoid Muscle: Function & Nerve

16. Medial Pterygoid Muscle: Function & Nerve

The medial pterygoid muscle is a muscle associated with the inner part of the jaw. In this lesson, learn about the functions and the nerve associated with the medial pterygoid muscle.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

Earning College Credit

Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.

To learn more, visit our Earning Credit Page

Transferring credit to the school of your choice

Not sure what college you want to attend yet? Study.com has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.

Support