Muscles of the Shoulder Joint

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mandelyn
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241808
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Muscles of the Shoulder Joint
Updated:
2013-10-21 02:14:31
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UCMT
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Muscles of the shoulder joint
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  1. What is the weakest ligamentous joint in the body?
    Shoulder
  2. What kind of joint is the shoulder?
    Ball and socket
  3. The shoulder joint is made up of the articulations between the ____________ and the ____________.
    • head of the humerus
    • glenoid cavity of the scapula
  4. Origin of supraspinatus?
    supraspinous fossa
  5. Insertion of supraspinatus?
    greater tubercle of the humerus (superior 1/3)
  6. Function of supraspinatus?
    • Abduction of shoulder
    • Stabilize shoulder joint
  7. What muscle performs the first 10o of abduction?
    supraspinatus
  8. What are the two shoulder abductors?
    • supraspinatus
    • deltoid
  9. Supraspinatus is _________ to trapezius.
    deep
  10. Origin of infraspinatus?
    infraspinous fossa
  11. Insertion of infraspinatus?
    greater tubercle of humerus (middle 1/3)
  12. Function of infraspinatus?
    • Lateral rotation of shoulder
    • Stabilize shoulder joint
  13. What are the two lateral rotators of the shoulder?
    • infraspinatus
    • teres minor
    • and the deltoid provides weak lateral rotation
  14. Origin of teres minor?
    upper lateral margin of scapula
  15. Insertion of teres minor?
    greater tubercle of humerus (lower 1/3)
  16. Function of teres minor?
    • Lateral rotation of shoulder
    • Stabilize shoulder joint
  17. Teres minor is ________ to teres major.
    superior
  18. Teres minor is _________ than teres major.
    smaller
  19. Origin of subscapularis?
    subscapular fossa
  20. Insertion of subscapularis?
    lesser tubercle of humerus
  21. Function of subscapularis?
    • Medial rotation of shoulder
    • Stabilize shoulder joint
  22. The ______________ muscle is sandwiched between the scapula and serratus anterior.
    subscapularis
  23. What is the only rotator cuff muscle to attach to the lesser tubercle of the humerus?
    subscapularis
  24. What are the 4 rotator cuff muscles?
    • Supraspinatus
    • Infraspinatus
    • Teres minor
    • Subscapularis
  25. What is the only muscle in the rotator cuff group that performs medial rotation?
    subscapularis
  26. All 4 of the rotator cuff muscles __________ on the scapula and _______ on the humerus.
    • originate
    • insert
  27. Which muscle group performs the ligamentous role at the shoulder joint?
    rotator cuff group

    • 1. supraspinatus
    • 2. infraspinatus
    • 3. teres minor
    • 4. subscapularis
  28. Which muscle group anchors the head of the humerus to the glenoid cavity of the scapula?
    rotator cuff group

    • 1. supraspinatus
    • 2. infraspinatus
    • 3. teres minor
    • 4. subscapularis
  29. Which of the rotator cuff muscles perform medial rotation?
    subscapularis
  30. Which of the rotator cuff muscles perform lateral rotation?
    • infraspinatus
    • teres minor
  31. Which of the rotator cuff muscles perform abduction of the shoulder joint?
    supraspinatus
  32. What muscle(s) make up the shoulder cap?
    deltoid
  33. Origin of deltoid?
    • Lateral 1/3 of clavicle
    • acromion
    • spine of the scapula
  34. Insertion of deltoid?
    deltoid tuberosity
  35. Function of deltoid?
    • Shoulder flexion
    • Shoulder extension
    • Shoulder abduction
    • Weak medial rotation
    • Weak lateral rotation
  36. The deltoid is found _________ to the rotator cuff group.
    Superficial
  37. The origin of the _________ is the same as the insertion of the ___________.
    • deltoid
    • trapezius
  38. The __________ muscle can only perform abduction after the first 10o.
    deltoid
  39. What are the 3 intertubercular groove muscles?
    • Pectoralis major
    • Teres major
    • Latissimus dorsi
  40. Origin of pectoralis major?
    • Medial half of clavicle
    • Sternum
    • Costal cartilages of ribs 1-9 (by sternum)
  41. Insertion of pectoralis major?
    intertubercular groove
  42. Function of pectoralis major?
    • Medial rotation of shoulder
    • Shoulder adduction
    • Flexion of an extended shoulder
  43. Pectoralis major is _________ to pectoralis minor.
    superficial
  44. Pectoralis major forms the ________ wall of the axilla.
    anterior
  45. Origin of teres major?
    • Inferior angle of the scapula
    • Lateral margin of scapula
  46. Insertion of teres major?
    intertubercular groove
  47. Function of teres major?
    • Medial rotation of the shoulder
    • Shoulder adduction
    • Extension of a flexed shoulder
  48. Teres major is found ___________ to teres minor.
    inferior
  49. Teres major forms the __________ (_______) border of the _________ (_______) wall of the axilla
    • inferior
    • bottom
    • posterior
    • back
  50. Origin of latissimus dorsi?
    • Spinous processes of T7-sacral processes
    • posterior iliac crest
  51. Insertion of latissimus dorsi?
    intertubercular groove
  52. Function of latissimus dorsi?
    • Medial rotation of the shoulder
    • Shoulder adduction
    • Extension of a flexed shoulder
  53. Which muscle creates the aponeurotic nature over the spine?
    latissimus dorsi
  54. What is the most superficial muscle in the low back?
    latissimus dorsi
  55. Only the trapezius is more superficial than _____________.
    latissimus dorsi
  56. What muscle is also known as the swimmer muscle?
    latissimus dorsi
  57. All the intertubercular groove muscles __________ on the intertubercular groove.
    Insert
  58. The intertubercular groove muscles are powerful ____________ and ____________ of the shoulder joint
    • Adductors
    • Medial rotators
  59. Which muscles cause flexion of the shoulder joint?
    • Deltoid
    • Pectoralis Major (extended)
  60. Which muscles cause extension of the shoulder joint?
    • Deltoid
    • Teres major (flexed)
    • Latissimus dorsi (flexed)
  61. Which muscles cause abduction of the shoulder joint?
    • Supraspinatus
    • Deltoid
  62. Which muscles cause adduction of the shoulder joint?
    • Pectoralis Major
    • Teres major
    • Latissimus dorsi
  63. Which muscles cause medial rotation of the shoulder joint?
    • Subscapularis
    • Deltoid
    • Pectoralis major
    • Teres major
    • Latissimus dorsi
  64. Which muscles cause lateral rotation of the shoulder joint?
    • Infraspinatus
    • Teres minor
    • Deltoid

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