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Musculoskeletal Anatomy > Scapular and Pectoral Region > Flashcards

Scapular and Pectoral Region Flashcards

1
Q

Prime mover of scapular elevation

A

Trapezius

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2
Q

Prime mover of scapular depression

A

Gravity

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3
Q

Prime mover of scapular inferior rotation

A

Latissimus Dorsi

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4
Q

Prime mover of scapular superior rotation

A

Trapezius and serratus anterior

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5
Q

Prime mover of scapular protraction

A

Serratus anterior

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6
Q

Prime mover of scapular retraction

A

Trapezius

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7
Q

Origin of trapezius

A

Occipital one, spinous process of C7-T12

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8
Q

Insertion of trapezius

A

Lateral 1/3 of clavicle, scapular spine, acromion process

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9
Q

Action of trapezius

A

Depends on fibers activated
Elevation (descending), depression (ascending), retraction (middle), superior rotation (ascending and descending)

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10
Q

Innervation for trapezius

A

Accessory nerve (CN XI)

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11
Q

Origin of latissimus dorsi

A

Spinous process T7-12

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12
Q

Insertion of latissimus dorsi

A

Intertubercular sulcus of humerus

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13
Q

Action of latissimus dorsi

A

Adduction, extension, and medial rotation of humerus (toilet paper muscle)

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14
Q

Innervation of latissimus dorsi

A

Thoracodorsal nerve

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15
Q

Origin of levator scapulae

A

Transverse processes of C1-4

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16
Q

Insertion of levator scapulae

A

Superior angle of scapula

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17
Q

Action of levator scapulae

A

Elevation and inferior rotation

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18
Q

Innervation of levator scapulae

A

Dorsal scapular nerve

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19
Q

Origin of rhomboid minor

A

Spinous processes of C7-T1

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20
Q

Insertion of rhomboid minor

A

Medial border of scapula at scapular spine

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21
Q

Action of rhomboid minor

A

Elevates and retracts scapula

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22
Q

Innervation of rhomboid minor

A

Dorsal scapular nerve

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23
Q

Origin of rhomboid major

A

Spinous processes of T2-5

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24
Q

Insertion of rhomboid major

A

Medial border of scapula inferior to scapular spine

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25
Q

Action of rhomboid major

A

Elevation and retractions

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26
Q

Innervation of rhomboid major

A

Dorsal scapular nerve

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27
Q

Origin of pectoralis major (clavicular head)

A

Medial 1/3 of clavicle

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28
Q

Insertion of pectoralis major

A

Lateral lip of intertubercular sulcus

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29
Q

Origin of pectoralis major (sternocostal head)

A

Sternum and costal cartilages 1-6

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30
Q

Origin of pectoralis major (abdominal head)

A

Aponeurosis of external oblique

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31
Q

Innervation of pectoralis major

A

Medial and lateral pectoral nerve

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32
Q

Action of clavicular head of pectoralis major

A

Arm flexion

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33
Q

Action of sternocostal head of pectoralis major

A

Extend arm from flexed position

34
Q

Action of the entire pectoralis major muscle

A

Adduct and medially rotate arm

35
Q

Origin of pectoralis minor

A

Ribs 3-5

36
Q

Insertion of pectoralis minor

A

Coracoid process

37
Q

Action of pectoralis minor

A

Protract scapular and elevate ribs

38
Q

Innervation of pectoralis minor muscle

A

Medial pectoral nerve

39
Q

Origin of subclavius

A

Rib 1

40
Q

Insertion of subclavius

A

Inferior clavicle

41
Q

Action of subclavius

A

Depress clavicle

42
Q

Innervation of subclavius

A

Subclavius nerve

43
Q

Origin of serratus anterior

A

Ribs 1-9

44
Q

Insertion of serratus anterior

A

Anterior surface of medial border of scapula

45
Q

Actions of serratus anterior

A

Protraction and superior rotation of scapula

46
Q

Innervation of serratus anterior

A

Long thoracic nerve

47
Q

Origin of posterior/spinal head of deltoid

A

Scapular spine

48
Q

Origin of middle/acromial head of deltoid

A

Acromion process

49
Q

Origin of anterior/clavicular head of deltoid

A

Lateral third of clavicle

50
Q

Insertion of deltoid

A

Deltoid tuberosity

51
Q

Action of anterior head of deltoid

A

Flex and medially rotate humerus

52
Q

Action of middle head of deltoid

A

Abduct humerus

53
Q

Action of posterior head of deltoid

A

Extend and laterally rotate humerus

54
Q

Innervation of deltoid

A

Axillary nerve

55
Q

Origin of teres major

A

Inferior angle of scapula

56
Q

Insertion of teres major

A

Medial lip of intertubercular sulcus

57
Q

Action of teres major

A

Adduct and medially rotate humerus

58
Q

Innervation of teres major

A

Lower subscapular nerve

59
Q

Muscles of the rotator cuff

A

Supraspinatus, infraspinatus, teres minor, subscapularis

60
Q

Origin of supraspinatus

A

Supraspinous fossa

61
Q

Insertion of supraspinatus

A

Greater tubercle

62
Q

Action of supraspinatus

A

Initiates abduction

63
Q

Innervation of supraspinatus

A

Suprascapular nerve

64
Q

Origin of infraspinatus

A

Infraspinous fossa

65
Q

Insertion of infraspinatus

A

Greater tubercle

66
Q

Action of infraspinatus

A

Lateral rotation

67
Q

Innervation of infraspinatus

A

Suprascapular nerve

68
Q

Origin of teres minor

A

Lateral border of scapula

69
Q

Insertion of teres minor

A

Greater tubercle

70
Q

Innervation of teres minor

A

Axillary nerve

71
Q

Origin of subscapularis

A

Subscapular fossa

72
Q

Insertion of subscapularis

A

Lesser tubercle

73
Q

Action of subscapularis

A

Medial rotation

74
Q

Innervation of subscapularis

A

Upper and lower subscapular nerve

75
Q

Blood supply to pectoral muscles

A

Pectoral branches of the thoracoacromial trunk

76
Q

Blood supply to anterior deltoid

A

Deltoid branches of the thoracoacromial trunk

77
Q

Blood supply to serratus anterior

A

Lateral thoracic artery from the axillary artery

78
Q

Blood supply to supra and infraspinatus

A

Suprascapular and circumflex scapular artery

79
Q

Blood supply to teres major

A

Circumflex scapular and thoracodorsal

80
Q

Blood supply to posterior deltoid

A

Posterior circumflex humeral

Musculoskeletal Anatomy (17 decks)

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