Shoulder Complex Biomechanics Flashcards Preview

PT 506 Kinesio / Biomechanics > Shoulder Complex Biomechanics > Flashcards

Flashcards in Shoulder Complex Biomechanics Deck (124):
1

4 bones of shoulder complex

scapula, clavicle, humerus, sternum

2

four joints of shoulder

3 synovial (glenohumeral, acromioclavicular, sternoclavicular), 1 bone muscle bone articulation (scapulothoracic)

3

there are blank ligaments in shoulder complex

11

4

there are blank muscles in the shoulder complex

17

5

flexion, abduction, and scaption are all called blank because they have this ROM

elevation (170-180)

6

external rotation normal value in base position

40-60

7

external rotation normal value in supine abduction to 90 degrees position

90-100

8

internal rotation normal value in supine abduction to 90 degrees position

45-60

9

FIR will have thumb go to about blank

t5

10

FER will have thumb go to about blank

t3

11

horizontal abduction normal value standing

120-140

12

horizontal adduction normal value standing

40-60

13

plane of horizontal ab/adduction

transverse plane

14

extension or hyperextension normal ROM from standing

60-80

15

superior angle is usually at blank

t2

16

inferior angle is usually at blank

t7

17

about a blank distance between root of spine of scapula and t3

2 inch

18

3-5 degrees of upward scapular rotation is blank while downward is blank

good, bad

19

upward rotation promotes blank

inferior stability

20

a downwardly rotated scapula indicates adaptively blank sgh and coracohumeral ligaments

lengthened

21

scapular blank mechanism shows up as relaxation of sghl and chl and as a potential for false positive sulcus test

dumping

22

AMBRI stands for blank

atraumatic, multidirectional, bilateral, responds to Rehab, no Inferior capsular shift surgery needed

23

TUBS stands for blank

traumatic, unilateral lesion, Bankart lesion, requires surgery

24

disruption of anterior capsule of shoulder

Bankart lesion

25

scapular dumping typical posture is blank head and blank shoulders

protracted, rounded

26

slight anterior tilting or anteflexion of scapula by about blank degrees

9-20

27

excessive kyphosis will cause further blank of the scapula which sets up for a blank impingement

anterior tilting, external

28

pos means

plane of the scapula

29

pos is blank degrees anterior to frontal plane

30

30

scapulo clavicular angle is blank degrees

50

31

clavicular retraction angle is blank degrees

20

32

scapulothoracic motions do not occur blank

independently

33

elevation of scapula is a blank translation

cephalad

34

depression is a blank translation

caudal

35

protraction is coupled with blank rotation

medial

36

retraction is coupled with blank rotation

lateral

37

clavicle elevates and depresses the same as the blank

scapula

38

protraction is a blank translation

abduction

39

retraction is a blank translation

adduction

40

anterior tipping of scapula is coupled with blank and blank

upward rotation, protraction

41

posterior tipping of scapula is coupled with blank and blank

downward rotation, retraction

42

medial rotation of scapula has glenoid fossa going blank

anterior

43

lateral rotation of scapula has glenoid fossa going blank

posterior

44

rotary motions of scapula occur at the blank joint

ac

45

scapular winging results in blank displacement of the medial border of the scapula

posterior

46

pathological medial scapular rotation (winging) is due to either this muscle or blank nerve palsy

serratus anterior, long thoracic

47

upward rotation of scapula is coupled with clavicular blank

elevation

48

downward rotation of scapula is coupled with clavicular blank

depression

49

ac joint has a blank lateral clavicle and a blank acromion

convex, concave

50

ac joint is blank with a blank disc

synovial, fibrocartilaginous

51

ac joint is stabilized by these ligaments

conoid, trapezoid, ac

52

ac joint is configurated blank

incongruent

53

sc joint is blank with a blank disc

synovial, articular

54

sc joint is blank clavicle on blank sternum in the frontal plane

convex, concave

55

sc joint is blank clavicle on blank sternum in the transverse plane

concave, convex

56

sc joint is a blank joint

saddle synovial

57

ligament that limits clavicle elevation at sc joint

costoclavicular ligament

58

transverse plane motions of sc joint

posterior/anterior roll/glide

59

frontal plane motions of sc joint

superior/inferior roll/glide

60

sc joint has no anterior rotation from blank

anatomic neutral

61

there is a max of blank humeral head in contact with glenoid

1/3

62

ap cross section shows a smaller blank than si cross section

concavity

63

humeral head faces blank, blank, and blank

medially, superiorly, posteriorly

64

full normal er and ir are from purely blank joint

gh

65

full elevation of upper extremity requires blank to prevent impingement of greater tuberosity of humerus against acromion and provide greater humeral head blank

er, articular surface

66

gh joint is blank on blank

convex, concave

67

integrated fxn of sc, ac, gh, and scapulothoracic joint is called blank

scapulohumeral rhythm

68

scapulohumeral rhythm allows for the maintain optimum blank relationship for scapulohmeral musculature

length tension

69

phase 1a of ue elevation is mostly blank

gh

70

there is an blank pattern of scapular motion during phase 1a

inconsistent

71

scapula is simply blank during phase 1A

stabilizing

72

phase 1A is during blank degrees of scaption and blank degrees of flexion

0-30, 0-60

73

phase 1B is during blank degrees of scaption and blank degrees of flexion

30-90, 60-90

74

consistent blank of scapula during phase 1B of ue elevation

upward rotation

75

acromion ellevates as well as blank during 1B

clavicle

76

phase 2A is during blank degrees of elevation

90-120

77

clavicular elevation blank loads cc ligaments during 2A

tension

78

as clavicle elevation slows during 2A, instantaneous center shifts to blank joint

ac

79

phase 2B is during blank degrees of elevation

120 - end ROM

80

IC of rotation is at blank during 2B

ac joint

81

scapular upward rotation is accompanied by corocoid blank during 2B

depression

82

depression of corocoid tension loads blank ligaments

cc

83

cc tension load imparts a blank force on the posterior clavicle via the blank ligament

downward, conoid

84

blank clavicular rotation occurs during phase 2B

posterior

85

clavicles shape

crank

86

clavicle shape allows blank degrees of elevation of outer clavicle

30

87

posterior clavicle rotation aids scapular blank tilting/tipping

posterior

88

during this phase, trapezius can finally produce upward scapular rotation

2b

89

the gh joint does not blank

elevate

90

the deltoid tries to pull the humeral head blank

superior

91

deltoid and rc are a blank pair to bring arm overhead

syngergistic

92

most important synergist with deltoid to raise arm overhead

supraspinatus

93

greater compressive force reduces blank force

shear

94

subscap, infraspinatus, and teres minor all help the supraspinatus because they have a blank directed force

medially

95

in coracoacromial space there is only blank space

4 dimes high

96

impingement is a blank

etiology

97

superior impingement is due to a weak blank and blank taking over

rotator cuff, deltoid

98

bone spur on acromion can tear the blank muscle

supraspinatus

99

torn supraspinatus and teres minor are likely to have a torn blank because of negative pressure

capsule

100

sticking a needle into subacromial space with produce immediate blank because of venting

inferior subluxation

101

shoulder will often pop and crack a couple days after cortisone shot because of blank

negative pressure

102

this envelopes the humeral head

labrum

103

labrum is blank thick inferior and superior but blank thick anterior and posterior

more, less

104

intact labrum, the gh joint resists dislocation forces of up to blank percent of compressive loads in the inferior direction

64

105

removed labrum there is a blank percent reduction in dislocation protection

20%

106

deltoid, supraspinatus, infraspinatus, teres minor all blank humeral head into cavity

compress

107

strengthening rotator cuff is like a buttressing effect because it aids in blank of the humeral head in the glenoid

centering

108

part of capsule that restrains flexion

posterior capsule

109

gh ligaments are only check reins when the motion is near blank

end range

110

tight anterior capsule would cause a blank translation

obligate posterior

111

tight posterior capsule would cause a blank translation

obligate anterior

112

overly aggressive stretch can cause hypermobility and a blank

internal impingement (tendonitis)

113

three parts of inferior glenohumeral ligament

anterior band, axillary pouch, posterior band

114

flexion check reins

middle posterior capsule, anterior coracohumeral ligament

115

abduction check reins

posterior coracohumeral ligament, inferior posterior capsule

116

internal rotation check reins

superior/middle posterior capsule, middle glenohumeral ligament

117

check reins for external rotation

superior/middle glenohumeral ligament, anterior/posterio coracohumeral ligament

118

sghL is also a primary stabilizer to blank humeral head translation

anterior

119

not much ligamentous restraint for blank translation of humeral head

posterior

120

for 45 degree scaption, blank resists anterior humeral head translation mostly

MGHL

121

90 degrees scaption, blank stabilizes against anterior humeral head translation

IGHL

122

IGHL during internal rotation goes blank

superior

123

IGHL during external rotation goes blank

inferior

124

hypermobility on one side of capsule can lead to tear on blank

opposite side (circle of instability)