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3.  posterior shoulder  back(1)
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3. posterior shoulder back(1)

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  • 1. Figure 8.17; page 182 Chart 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**
  • 2. Trapezius (another look) Note how the muscle is connected to the scapula & to the vertebral column
  • 3. Figure 8.17; page 182 Chart 8.6; page 183 Function? ?Rhomboideus major Raises and adducts the scapula
  • 4. Rhomboideus major (another look) Note how the muscle is connected to the scapula
  • 5. Figure 8.17; page 182 Chart 8.6; page 183 Function? ?Levator scapulae Elevates the scapula
  • 6. Levator scapulae (another look) Note how the muscle is connected to the scapula
  • 7. Figure 8.17; page 182 Chart 8.7; page 184 Function? ?Teres major Extends the humerus; adducts and rotates the arm medially
  • 8. Teres major (another look) Note how the muscle wraps around from the posterior to the anterior side of the humerus
  • 9. Figure 8.17; page 182 Chart 8.7; page 184 Function? ?Latissimus dorsi Extends and adducts the arms and rotates the humerus inwardly; pulls the shoulder downward and back
  • 10. Latissimus dorsi (another look) Note how the muscle wraps around from the posterior to the anterior side of the humerus
  • 11. Figure 8.17; page 182 Chart 8.7; page 184 Function? ?Supraspinatus Abducts the upper arm
  • 12. Supraspinatus (another look) Note how the muscle wraps over the top of the shoulder joint and to the lateral side of the humerus
  • 13. Figure 8.17; page 182 Chart 8.7; page 184 Function? ?Deltoid Abducts the upper arm, extends the humerus, or flexes the humerus **Repeat Muscle**
  • 14. Deltoid (another look) Note how the muscle wraps over the top of the shoulder joint and to the anterior side of the humerus
  • 15. Figure 8.17; page 182 Chart 8.7; page 184 Function? ?Infraspinatus Rotates the arm laterally
  • 16. 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
  • 17. Figure 8.17; page 182 Chart 8.7; page 184 Function? ?Teres minor Rotates the arm laterally
  • 18. 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