Ch 8: Muscles of the Abdomen

About This Chapter

Review this series of lessons and quizzes to learn about the muscles of the chest and abdomen. The chapter can benefit anyone who needs to review basic information about these muscles for exams, assignments or homework.

Muscles of the Chest & Abdomen - Chapter Summary

If you need to study the muscles of the chest and abdomen, this chapter is for you. Using an engaging and simplified teaching style, our expert instructors explain important information about the functions, locations, insertions and innervations of chest and abdomen muscles. Our short lessons come with interactive quizzes to help you check your understanding of muscle terms and concepts. You can complete the chapter at your own pace, and it's accessible on any device that has an Internet connection. When you're finished with the chapter, you should be able to:

  • Recognize the locations and functions of intercostal muscles, serratus posterior muscles and the diaphragm muscle
  • Explain the origin of transversus abdominis
  • Tell where the rectus abdominis muscle is located
  • Evaluate the symptoms of diastasis rectus abdominis and rectus abdominis hematoma
  • Assess the functions of the cremaster muscle and the quadratus lumborum
  • Differentiate between external and internal oblique muscles
  • Compare the functions of pectroalis major and pectorals minor muscles
  • Identify the symptoms of pectoralis minor syndrome
  • Describe subclavius muscle insertion and nerves
  • Understand the function and innervation of the serrates anterior muscle

14 Lessons in Chapter 8: Muscles of the Abdomen
Test your knowledge with a 30-question chapter practice test
Intercostal Muscles: Definition, Function & Location

1. Intercostal Muscles: Definition, Function & Location

The human body is made up of many different muscles. Intercostal muscles are found between the ribs. This lesson will discuss what the intercostal muscles are, where they are located, and what they do.

Serratus Posterior Muscles: Function & Innervation

2. Serratus Posterior Muscles: Function & Innervation

How much do you know about the innervation and function of the serratus posterior muscles located in your back? If you answered ''not much,'' then you should definitely check out this lesson!

Diaphragm Muscle: Definition, Anatomy & Function

3. Diaphragm Muscle: Definition, Anatomy & Function

Breathing is essential to life and depends almost completely on the function of the diaphragm. In this lesson, you will learn what the diaphragm is, what it's made of, and how it functions.

Transversus Abdominis: Function, Origin & Insertion

4. Transversus Abdominis: Function, Origin & Insertion

This lesson will describe the transversus abdominis: an abdominal muscle which works to stabilize the lower back and pelvis and support the abdominal wall. In this lesson, you will learn about the muscle's function, origin, and insertion.

Rectus Abdominis Muscle: Definition, Location & Function

5. Rectus Abdominis Muscle: Definition, Location & Function

One of the most coveted body parts is a six-pack set of ''abs,'' a muscle that scientists call rectus abdominis. This lesson will teach all kinds of interesting facts about the rectus abdominis muscle, including its definition, location, and function.

Rectus Abdominis Muscle: Action, Origin & Insertion

6. Rectus Abdominis Muscle: Action, Origin & Insertion

The rectus abdominis muscle is the muscle located at the front of the abdomen that is most often called the 'abs' or the 'six-pack.' Get ready to learn all about this muscle, including its action, origin, and insertion!

Diastasis Rectus Abdominis: Symptoms & Treatment

7. Diastasis Rectus Abdominis: Symptoms & Treatment

Diastasis rectus abdominis, or diastasis recti, is a common condition affecting the abdominal muscle. It generally occurs in women during and after pregnancy. In this lesson, you will learn about the symptoms and treatment of diastasis rectus abdominis.

Rectus Abdominis Hematoma: Symptoms & Treatment

8. Rectus Abdominis Hematoma: Symptoms & Treatment

The rectus abdominis is a muscle that forms the abdominal wall. A hematoma is a collection of blood in the body due to trauma or force. This lesson will discuss the symptoms, causes, diagnosis, and treatment of a hematoma in the rectus abdominis.

Quadratus Lumborum: Definition, Function & Innervation

9. Quadratus Lumborum: Definition, Function & Innervation

Did you know that the quadratus lumborum muscle is often considered both an abdominal AND back muscle? Learn why this is, as well as other great information about this muscle, in this lesson.

Quadratus Lumborum: Action, Origin & Insertion

10. Quadratus Lumborum: Action, Origin & Insertion

Have you ever sat for so long that your lower back started hurting? If so, there is a good chance that the pain was caused by the quadratus lumborum muscle, one of the many abdominal muscles. This lesson will teach about the origin, insertion, and action of this muscle.

External Oblique: Definition, Function & Aponeurosis

11. External Oblique: Definition, Function & Aponeurosis

The external oblique is a muscle that is part of the abdominal muscles. This lesson will discuss what the external oblique muscles are, what they do, and what the aponeurosis is.

External Oblique Muscle: Action, Origin & Insertion

12. External Oblique Muscle: Action, Origin & Insertion

'Oblique' is a term than means diagonal or slanting. Therefore, the external obliques are muscles that run diagonally in the body. Learn all about the external obliques, including their origin, insertion, and action, in this lesson.

Internal Oblique Muscle: Action, Origin & Insertion

13. Internal Oblique Muscle: Action, Origin & Insertion

The internal oblique is very important muscle when celebrating your birthday. Find out why, as well as the action and origin of this muscle, by reading the rest of this lesson.

Internal Oblique: Definition, Location & Function

14. Internal Oblique: Definition, Location & Function

The internal oblique is a part of a group of abdominal muscles that help support the abdominal wall. This lesson will define the internal oblique muscle and discuss the location and function.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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