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Kinesiology PTA 125 > ch 10- shoulder joint muscles > Flashcards

ch 10- shoulder joint muscles Flashcards

1
Q

superficial muscle that covers the shoulder joint on the three sides giving the shoulder a round shape; triangular shaped; divided into anterior, middle, and posterior

A

deltoid

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2
Q

spans the joint on anterior surface at an oblique angle

A

anterior deltoid

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3
Q

when arm is at shoulder level, the line of pull of the anterior deltoid changes to

A

horizontal

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4
Q

O- lateral third of clavicle

A

anterior deltoid

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5
Q

I- deltoid tuberosity

A

anterior deltoid

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6
Q

A- shoulder abduction, flexion, medial rotation, ad horizontal adduction

A

anterior deltoid

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7
Q

N- axillary nerve (C5, C6)

A

anterior deltoid

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8
Q

vertical line of pull lateral to joint axis

A

middle deltoid

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9
Q

O- acromion process

A

middle deltoid

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10
Q

I- deltoid tuberosity

A

middle deltoid

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11
Q

A- shoulder abduction

A

middle deltoid

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12
Q

N- axillary nerve (C5-6)

A

middle deltoid

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13
Q

oblique line of pull posterior to joint axis

A

posterior deltoid

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14
Q

when arm is at shoulder level, the line of pull of posterior deltoid changes to

A

posterior deltoid

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15
Q

O- spine of scapula

A

posterior deltoid

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16
Q

I- deltoid tuberosity

A

posterior deltoid

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17
Q

A- shoulder abduction, extension, hyperextension, lateral rotation, and horizontal abduction

A

posterior deltoid

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18
Q

N- axillary nerve (C5, C6)

A

posterior deltoid

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19
Q

large muscle of chest; superficial except for its distal attachment lying under deltoid muscle

A

pectoralis major

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20
Q

crosses joint on anterior surface in horizontal direction, creating medial pull on humerus

A

pectoralis major

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21
Q

O- medial third of clavicle, sternum, and costal cartilage of ribs 1-6

A

pectoralis major

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22
Q

I- lateral lip of bicipital groove of humerus

A

pectoralis major

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23
Q

A- shoulder adduction, medial rotation, and horizontal adduction

A

pectoralis major

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24
Q

N- lateral and medial pectoral (C5-T1)

A

pectoralis major

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25
Q

more vertical line of pull when shoulder is extended and when at shoulder level, it becomes a horizontal line of pull

A

pectoralis major- clavicular portion

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26
Q

O- medial third of clavicle

A

pectoralis major- clavicular portion

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27
Q

I- lateral lip of bicipital groove of humerus (inferior to sternal portion)

A

pectoralis major- clavicular portion

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28
Q

A- shoulder flexion (first 60 degrees)

A

pectoralis major- clavicular portion

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29
Q

Vertical line of pull when shoulder is in full flexion and loses effectiveness at midrange extension

A

pectoralis major- sternal portion

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30
Q

O- sternum, costal cartilage of ribs 1-6

A

pectoralis major- sternal portion

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31
Q

I- lateral lip of bicipital groove of humerus (superior to clavicular portion)

A

pectoralis major- sternal portion

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32
Q

A- shoulder extension (first 60 degrees- from 180 to 120)

A

pectoralis major- sternal portion

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33
Q

pectoralis major is an antagonist in which motions?

A

flexion and extension

34
Q

pectoralis major is an agonist in which motions?

A

shoulder adduction, medial rotation, and horizontal adduction

35
Q

broad, sheetlike muscle located on back; crosses the shoulder joint inferior and medial to joint axis

A

latissimus dorsi

36
Q

mostly superficial except for small portion covered posteriorly by lower trapezius and covered distally as it passes through the axilla to attach on floor of bicipital groove just anterior to the insertion of teres major; groove is on proximal, anterior surface of the humerus

A

latissimus dorsi

37
Q

O- spinous processes of T7-L5 (thoracolumbar fascia), posterior surface of sacrum, iliac crest, and lower three ribs

A

latissimus dorsi

38
Q

I- medial floor of bicipital groove of humerus

A

latissimus dorsi

39
Q

A- shoulder extension, adduction, medial rotation, hyperextension

A

latissimus dorsi

40
Q

N- thoracodorsal nerve (C6-8)

A

latissimus dorsi

41
Q

superficial muscle; “little helper” of latissimus dorsi muscle

A

teres major

42
Q

O- inferior axillary border of scapula near the inferior angle

A

teres major

43
Q

I- medial lip of bicipital groove on anterior surface of humerus

A

teres major

44
Q

A- shoulder extension, adduction, and medial rotatin

A

teres major

45
Q

N- lower subscapular nerve (C5-7)

A

teres major

46
Q

crosses superior aspect of shoulder joint; important in stabilizing the head of humerus against the glenoid fossa

A

supraspinatus

47
Q

horizontal line of pull which pulls head of humerus into glenoid fossa

A

supraspinatus

48
Q

O- supraspinous fossa of scapula

A

supraspinatus

49
Q

I- greater tubercle of humerus

A

supraspinatus

50
Q

A- shoulder abduction

A

supraspinatus

51
Q

N- suprascapular nerve (C5, 6)

A

supraspinatus

52
Q

superficial but portions covered by trapezius and deltoid; horizontal line of pull passing posterior to joint; important role in stabilizing the head of the humerus against the glenoid fossa

A

infraspinatus

53
Q

O- infraspinous fossa of scapula

A

infraspinatus

54
Q

I- greater tubercle of humerus

A

infraspinatus

55
Q

A- shoulder lateral rotation, horizontal abduction

A

infraspinatus

56
Q

N- suprascapular nerve (C5,6)

A

infraspinatus

57
Q

run obliquely up and outward to attach to humerus; important role in stabilizing the head of humerus against glenoid fossa

A

teres minor

58
Q

O- axillary border of scapula

A

teres minor

59
Q

I- greater tubercle of humerus

A

teres minor

60
Q

A- shoulder lateral rotation, horizontal abduction

A

teres minor

61
Q

N- axillary nerve (C5,6)

A

teres minor

62
Q

supraspinatus, infraspinatus, teres minor, subscapularis

A

rotator cuff muscles

63
Q

deep in underside (anterior) of scapula lying next to rib cage; horizontal line of pull on anterior side of joint

A

subscapularis

64
Q

O- subscapular fossa of scapula

A

subscapularis

65
Q

I- lesser tubercle of humerus

A

subscapularis

66
Q

A- shoulder medial rotation

A

subscapularis

67
Q

N- upper and lower subscapular nerve (C5, 6)

A

subscapularis

68
Q

vertical line of pull close to joint axis; most force generated directly back into joint, stabilizing the head against glenoid fossa

A

coracobrachialis

69
Q

O- coracoid process of scapula

A

coracobrachialis

70
Q

I- medial surface of humerus near the midpoint

A

coracobrachialis

71
Q

A- stabilizes the shoulder joint

A

coracobrachialis

72
Q

N- musculocutaneous nerve (C5-7)

A

coracobrachialis

73
Q

flex joint because it crosses anteriorly; assistive to shoulder joint

74
Q

two joint muscle crossing the shoulder and elbow

75
Q

O- two heads on scapula (supraglenoid tubercle and coracoid process)

76
Q

I-radius (radial tuberosity)

77
Q

3 heads but only long head crosses shoulder joint

78
Q

assistive in shoulder joint; crosses posteriorly to extend joint

A

triceps (long head)

79
Q

O- scapula (infraglenoid tubercle)

A

triceps (long head)

80
Q

I- ulna (olecranon process)

A

triceps (long head)

Kinesiology PTA 125 (21 decks)

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