1. The Shoulder Complex

2. Muscles of the AC Joint
Chapter 4

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

4. Anterior Muscles
Pectoralis Minor
Serratus Anterior

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

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

10. Posterior Muscles
Levator Scapluae
Trapezius
Rhomboid

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

13. 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, & AC adduction
Lower – depression, AC adduction and upward rotation

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

15. Pull of the lower fibers
Movement of scapula

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

19. Subclavius Origin: Superior aspect of first rib
Insertion: Inferior aspect at mid-clavicle
Action
Depression
Stabilization

21. Muscles of the Shoulder Joint
Chapter 5

22. Anterior Shoulder (GH Joint) Muscles
Coracobrachialis
Pectoralis Major
Subscapularis

24. Coracobrachialis O: Coracoid process
I: Anteromedial surface of midshaft of humerus
Actions:
Flexion
Adduction of the shoulder
Horizontal Adduction

27. Pectoralis Major Origin: Insertion: intertubercular groove Actions
Medial two-thirds of clavicle
Sternum
Insertion: intertubercular groove
Actions
Upper fibers (Clavicular)
Internal rotation
Horizontal Adduction
Flexion
GH Adduction
[Abduction w/ Arm above 90 degrees]
Lower fibers (Sternal)
Internal Rotation
Horizontal adduction
Extension

30. Subscapularis O: Subscapular fossa
I: Lesser tubercle and crest of humerus
Actions:
Internal Rotation
GH Adduction
Extension from flexed position
Stabilization
Anterior Rotator Cuff Muscle.

32. Superior Shoulder Muscles
Deltoid
Supraspinatus

34. Deltoid Origin Insertion – deltoid tuberosity Actions
Lateral 1/3 of clavicle (Anterior fibers)
Acromion process (Middle fibers)
Spine of scapula (Posterior fibers)
Insertion – deltoid tuberosity
Actions
Anterior – GH Abduction, Flexion, Horizontal adduction, & Internal rotation.
Middle – GH Abduction
Posterior – GH Abduction, Extension, Horizontal abduction, & External rotation

36. Supraspinatus O: Supraspinous fossa I: Greater tubercle Action:
GH Abduction
Stabilization
Superior Rotator Cuff Muscle.

38. Inferior Shoulder Muscles
Latissimus Dorsi
Teres Major

39. Latissimus Dorsi
O: Spinous process of lower 6 thorasic and all lumbar and sacral vertebrae; iliac crest
I: Intertubercular groove
Actions:
Extension
GH Adduction
Horizontal Abduction

42. Teres Major O: Inferior angle of scapula I: Intertubercular groove
Actions:
Extension
GH Adduction
Internal rotation
“Lats little helper”

44. Posterior Shoulder Muscles
Infraspinatus
Teres Minor

46. Infraspinatus O: Infraspinous fossa I: Greater tubercle Actions:
External rotation
Horizontal abduction
Extension
Stabilization
Posterior Rotator Cuff Muscle

49. Teres Minor O: Upper 2/3 of lateral border of scapula
I: Greater tubercle
Actions:
External rotation
Horizontal abduction
Extension
Stabilization
Posterior Rotator Cuff Muscle

51. Practice Name the actions of the shoulder (GH) joint.
Flexion
Extension
Adduction
Abduction
Horizontal adduction
Horizontal abduction
Medial rotation
Lateral rotation.
Name the actions of the scapula (AC joint)
Elevation
Depression
Adduction (retraction)
Abduction (protraction)
Upward rotation an
Downward rotation.

52. Scapula Adduction Abduction Upward Rotation Downward Rotation
Trap (middle)
Pect Minor
Serratus Ant.
Trap (lower)
Rhomboid
Rhomboids

53. Practice Name the muscles for Horizontal Adduction Pect Major (upper)
Pect Major (lower)
Corachobrachialis
Deltoid (anterior)
Name the muscles for Horizontal Abduction
Deltoid (post)
Infraspinatus
Teres minor
Lats

54. Practice List the muscles the do flexion of the shoulder
List the muscles the do AC adduction

55. Name the muscle.
Coracobrachialis
Name the action
Adduction of the shoulder

56. Name the muscle.
Pectoralis Major

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

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

59. Name the muscle.
Subscapularis
Name the action
Internal rotation of the shoulder

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

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

62. Name the muscle.
Deltoid
Name the action
Abduction of shoulder

63. Name the muscle.
Infraspinatus
Name the action
External rotation

64. Name the action
Name the muscle.
Adduction of scapula
Teres Major

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

66. Name the muscle.
Teres Minor
Name the action if the humerus move directly to the posterior
Extension of the shoulder

67. Name the muscle.
Supraspinatus
Name the action
Abduction of the shoulder

68. ?
Latissimus Dorsi

69. Coracobrachialis
Pect. Major
Subscapularis
Deltoid

70. Supraspinatus
Teres Major
Infraspinatus
Teres Minor

71. Pectoralis Minor
Levator Scapula
Rhomboid

77. ?
Origin: Occipital bone, ligamentum nuchae, spinous process of the C7 and all Thorasic v.
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
Middle – retraction and upward rotation
Lower – depression and upward rotation

78. ? Origin: Supraspinatus fossa
Insertion: Greater tubercle of the humerus
Action: Weak abduction; stabilization
Name another muscle that abducts the shoulder.

79. ?
Origin: Medial 2/3 of the clavicle; medial portion of the first 6 ribs & the adjoining sternum.
Insertion: Outer lip of the intertubercular groove.

80. ?
Origin: 1) posterior crest of the iliac crest, 2) back of the sacrum and spinous processes of the lumbar and the lower 6 thorasic vertebrae and 3) inferior angle in some
Insertion: Intertubercle groove
Name a muscle that would have the same actions as this one.

81. ? Origin: Ligamentum nuchea and spinous process of C1-7 and 2-5 T
Insertion: Medial border of the scapula
Actions: Downward rotation, retraction, and elevation

82. ? Origin: Lateral surface of upper 8 ribs
Insertion: Anterior surface of medial border and inferior angle of scapula.
Actions: Protraction (upper) and Upward Rotation (upper and lower)

83. ?
Origin: lateral 1/3 of clavicle, border of Acromion, lower edge of the spine of the scapula
Insertion: deltoid tuberosity on the lateral side of the humerus
Actions
Anterior – Flexion, medial rotation and abduction
Middle – Abduction
Posterior – Extension, lateral rotation and abduction

84. ? Origin: Transverse processes of the first 4 cervical vertebrae.
Insertion: Superior angle and medial border of the scapula.
Action: Elevation