3. posterior shoulder back(1)

Figure 8.17; page 182Chart 8.6; page 183

Function?

?Trapezius

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

**Repeat Muscle**

Trapezius (another look)

Note how the muscle is connected to the scapula & to the vertebral column

Figure 8.17; page 182Chart 8.6; page 183

Function?

?Rhomboideus major

Raises and adducts the scapula

Rhomboideus major (another look)

Note how the muscle is connected to the scapula

Figure 8.17; page 182Chart 8.6; page 183

Function?

?Levator scapulae

Elevates the scapula

Levator scapulae (another look)

Note how the muscle is connected to the scapula

Figure 8.17; page 182Chart 8.7; page 184

Function?

?Teres major

Extends the humerus; adducts and rotates the arm medially

Teres major (another look)

Note how the muscle wraps around from the posterior to the anterior side of the humerus

Figure 8.17; page 182Chart 8.7; page 184

Function?

?Latissimus dorsi

Extends and adducts the arms and rotates the humerus inwardly; pulls the shoulder downward and back

Latissimus dorsi (another look)

Note how the muscle wraps around from the posterior to the anterior side of the humerus

Figure 8.17; page 182Chart 8.7; page 184

Function?

?Supraspinatus

Abducts the upper arm

Supraspinatus (another look)

Note how the muscle wraps over the top of the shoulder joint and to the lateral side of the humerus

Figure 8.17; page 182Chart 8.7; page 184

Function?

?Deltoid

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

**Repeat Muscle**

Deltoid (another look)

Note how the muscle wraps over the top of the shoulder joint and to the anterior side of the humerus

Figure 8.17; page 182Chart 8.7; page 184

Function?

?Infraspinatus

Rotates the arm laterally

Infraspinatus (another look)

Note how the muscle wraps over the posterior side of the shoulder joint and attaches to the posterior side of the humerus

Figure 8.17; page 182Chart 8.7; page 184

Function?

?Teres minor

Rotates the arm laterally

Teres minor (another look)

Note how the muscle wraps over the posterior side of the shoulder joint and attaches to the posterior side of the humerus just under the infraspinatus