2. chest abdomen

Figure 8.18; pg. 183Chart 8.5; page 182

Pulls the head to oneSide, pulls the head Toward the chest, or raises the sternum

**Repeat Muscle**

1

Sternocleidomastoid

Figure 8.18; page 183Chart 8.6; page 183

Rotates the scapula and raises the arm; raises the scapula; pulls the scapula medially; pulls the scapula and shoulder downward

2

Trapezius

Figure 8.18; page 183Chart 8.6; page 183

Pulls the scapula anteriorly and downward

3

Serratus anterior

Figure 8.18; page 183Chart 8.6; page 183

Pulls the scapula forward and downward or raises the ribs

4

Pectoralis minor

Figure 8.18; page 183Chart 8.7; page 184

Pulls the arm forward and across the chest, rotates the humerus, or adducts the arm

5

Pectoralis major

Figure 8.18; page 183Chart 8.7; page 184

Abducts the upper arm, extends the humerus, or flexes the humerus

Deltoid

6

Abdominal Muscles

Figure 8.18; page 183Chart 8.10; page 187

Figure 8.18; page 183Chart 8.10; page 187

Tenses the abdominal wall and compresses the abdominal contents

7

External oblique

External oblique (another view)

***Note how the external oblique is the most “external” or outward lying of the three cutaways***

Tenses the abdominal wall and compresses the abdominal contents

Figure 8.18; page 183Chart 8.10; page 187

Tenses the abdominal wall and compresses the abdominal contents

8

Internal oblique

Internal oblique (another view)

***Note how the internal oblique lies inside or “internal” to the “external” oblique

Tenses the abdominal wall and compresses the abdominal contents

Figure 8.18; page 183Chart 8.10; page 187

Transversus abdominis

Tenses the abdominal wall and compresses the abdominal contents

9

Transversus abdominis (another view)

***Note how the transversus abdominis lies most to the inside or internally

Tenses the abdominal wall and compresses the abdominal contents

Figure 8.18; page 183Chart 8.10; page 187

Tenses the abdominal wall and compresses the abdominal contents, also flexes the vertebral column

10

Rectus abdominis

Rectus abdominis (another view)

***Note how the rectus abdominis lies most medially of the four abdominals

Tenses the abdominal wall and compresses the abdominal contents, also flexes the vertebral column