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Muscles of Shoulder Girdle

Muscles of Shoulder Girdle. Chapter 4. Movements of the Scapula. 1. Elevation 2. Depression 3. Adduction (retraction) 4. Abduction (protraction). 5. Downward rotation 6. Upward rotation. Anterior Muscles. Pectoralis Minor Serratus Anterior. Pectoralis Minor.

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Muscles of Shoulder Girdle

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  1. Muscles of Shoulder Girdle Chapter 4

  2. Movements of the Scapula 1. Elevation 2. Depression 3. Adduction (retraction) 4. Abduction (protraction) 5. Downward rotation 6. Upward rotation

  3. Anterior Muscles • Pectoralis Minor • Serratus Anterior

  4. Pectoralis Minor • Origin: Anterior surface of 3, 4, and 5 ribs • Insertion: Coracoid process • Actions: • Abduction of the scapula • Downward rotation of the scapula • Depression of the scapula

  5. Serratus Anterior • Origin: Lateral surface of upper 8 ribs • Insertion: Anterior surface of medial border and inferior angle of scapula. • Actions: • Abduction of the scapula • Upward Rotation of the scapula

  6. Posterior Muscles • Levator Scapluae • Trapezius • Rhomboid

  7. Levator Scapulae • Origin: Transverse processes of the first 4 cervical vertebrae. • Insertion: Superior angle and medial border of the scapula. • Actions: Elevationof the scapula

  8. Trapezius • Origin: Occipital bone, ligamentum nuchae, spinous process of the C7 and all Thorasic vertebrae • Insertion: • 1. Lateral 1/3 of clavicle. • 2. Top of Acromion process. • 3. Upper border of spine of the scapula. • 4. Medial surface of spine of the scapula. • Actions: • Upper – elevation of the scapula • Middle – elevation, upward rotation, & adduction of the scapula • Lower – depression, AC adduction and upward rotation of the scapula

  9. Upper – elevation • Middle – elevation, upward rotation, & adduction • Lower – depression, adduction and upward rotation

  10. Pull of the lower fibers Movement of scapula

  11. Rhomboid (major and minor) • Origin: Ligamentum nuchea and spinous process of C1-7 and 2-5 T • Insertion: Medial border of the scapula • Actions: • Adduction of the scapula • Downward rotation of the scapula • Elevation of the scapula

  12. Subclavius • Origin: Superior aspect of first rib • Insertion: Inferior aspect at mid-clavicle • Action • Depression of the scapula • Stabilization of the scapula

  13. Scapula

  14. Name the muscle. Rhomboid Name the action Adduction of scapula

  15. Name the muscle. Pectoralis minor Name the action Depression of the scapula

  16. Name the muscle. Trapezius Name the action Adduction of the scapula Name the action Upward rotation

  17. Name the muscle. Levator scapula Name the action Elevation of the scapula

  18. Name the muscle. Serratus Anterior Name the action Abduction of scapula

  19. ? Latissimus Dorsi

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