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PT 506 Kinesio / Biomechanics > Shoulder Complex Biomechanics > Flashcards

Shoulder Complex Biomechanics Flashcards

1
Q

4 bones of shoulder complex

A

scapula, clavicle, humerus, sternum

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2
Q

four joints of shoulder

A

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

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3
Q

there are blank ligaments in shoulder complex

A

11

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4
Q

there are blank muscles in the shoulder complex

A

17

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5
Q

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

A

elevation (170-180)

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6
Q

external rotation normal value in base position

A

40-60

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7
Q

external rotation normal value in supine abduction to 90 degrees position

A

90-100

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8
Q

internal rotation normal value in supine abduction to 90 degrees position

A

45-60

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9
Q

FIR will have thumb go to about blank

A

t5

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10
Q

FER will have thumb go to about blank

A

t3

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11
Q

horizontal abduction normal value standing

A

120-140

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12
Q

horizontal adduction normal value standing

A

40-60

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13
Q

plane of horizontal ab/adduction

A

transverse plane

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14
Q

extension or hyperextension normal ROM from standing

A

60-80

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15
Q

superior angle is usually at blank

A

t2

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16
Q

inferior angle is usually at blank

A

t7

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17
Q

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

A

2 inch

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18
Q

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

A

good, bad

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19
Q

upward rotation promotes blank

A

inferior stability

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20
Q

a downwardly rotated scapula indicates adaptively blank sgh and coracohumeral ligaments

A

lengthened

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21
Q

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

A

dumping

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22
Q

AMBRI stands for blank

A

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

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23
Q

TUBS stands for blank

A

traumatic, unilateral lesion, Bankart lesion, requires surgery

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24
Q

disruption of anterior capsule of shoulder

A

Bankart lesion

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25
Q

scapular dumping typical posture is blank head and blank shoulders

A

protracted, rounded

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26
Q

slight anterior tilting or anteflexion of scapula by about blank degrees

A

9-20

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27
Q

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

A

anterior tilting, external

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28
Q

pos means

A

plane of the scapula

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29
Q

pos is blank degrees anterior to frontal plane

A

30

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30
Q

scapulo clavicular angle is blank degrees

A

50

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31
Q

clavicular retraction angle is blank degrees

A

20

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32
Q

scapulothoracic motions do not occur blank

A

independently

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33
Q

elevation of scapula is a blank translation

A

cephalad

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34
Q

depression is a blank translation

A

caudal

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35
Q

protraction is coupled with blank rotation

A

medial

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36
Q

retraction is coupled with blank rotation

A

lateral

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37
Q

clavicle elevates and depresses the same as the blank

A

scapula

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38
Q

protraction is a blank translation

A

abduction

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39
Q

retraction is a blank translation

A

adduction

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40
Q

anterior tipping of scapula is coupled with blank and blank

A

upward rotation, protraction

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41
Q

posterior tipping of scapula is coupled with blank and blank

A

downward rotation, retraction

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42
Q

medial rotation of scapula has glenoid fossa going blank

A

anterior

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43
Q

lateral rotation of scapula has glenoid fossa going blank

A

posterior

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44
Q

rotary motions of scapula occur at the blank joint

A

ac

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45
Q

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

A

posterior

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46
Q

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

A

serratus anterior, long thoracic

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47
Q

upward rotation of scapula is coupled with clavicular blank

A

elevation

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48
Q

downward rotation of scapula is coupled with clavicular blank

A

depression

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49
Q

ac joint has a blank lateral clavicle and a blank acromion

A

convex, concave

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50
Q

ac joint is blank with a blank disc

A

synovial, fibrocartilaginous

51
Q

ac joint is stabilized by these ligaments

A

conoid, trapezoid, ac

52
Q

ac joint is configurated blank

A

incongruent

53
Q

sc joint is blank with a blank disc

A

synovial, articular

54
Q

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

A

convex, concave

55
Q

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

A

concave, convex

56
Q

sc joint is a blank joint

A

saddle synovial

57
Q

ligament that limits clavicle elevation at sc joint

A

costoclavicular ligament

58
Q

transverse plane motions of sc joint

A

posterior/anterior roll/glide

59
Q

frontal plane motions of sc joint

A

superior/inferior roll/glide

60
Q

sc joint has no anterior rotation from blank

A

anatomic neutral

61
Q

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

A

1/3

62
Q

ap cross section shows a smaller blank than si cross section

A

concavity

63
Q

humeral head faces blank, blank, and blank

A

medially, superiorly, posteriorly

64
Q

full normal er and ir are from purely blank joint

A

gh

65
Q

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

A

er, articular surface

66
Q

gh joint is blank on blank

A

convex, concave

67
Q

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

A

scapulohumeral rhythm

68
Q

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

A

length tension

69
Q

phase 1a of ue elevation is mostly blank

A

gh

70
Q

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

A

inconsistent

71
Q

scapula is simply blank during phase 1A

A

stabilizing

72
Q

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

A

0-30, 0-60

73
Q

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

A

30-90, 60-90

74
Q

consistent blank of scapula during phase 1B of ue elevation

A

upward rotation

75
Q

acromion ellevates as well as blank during 1B

A

clavicle

76
Q

phase 2A is during blank degrees of elevation

A

90-120

77
Q

clavicular elevation blank loads cc ligaments during 2A

A

tension

78
Q

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

A

ac

79
Q

phase 2B is during blank degrees of elevation

A

120 - end ROM

80
Q

IC of rotation is at blank during 2B

A

ac joint

81
Q

scapular upward rotation is accompanied by corocoid blank during 2B

A

depression

82
Q

depression of corocoid tension loads blank ligaments

A

cc

83
Q

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

A

downward, conoid

84
Q

blank clavicular rotation occurs during phase 2B

A

posterior

85
Q

clavicles shape

A

crank

86
Q

clavicle shape allows blank degrees of elevation of outer clavicle

A

30

87
Q

posterior clavicle rotation aids scapular blank tilting/tipping

A

posterior

88
Q

during this phase, trapezius can finally produce upward scapular rotation

A

2b

89
Q

the gh joint does not blank

A

elevate

90
Q

the deltoid tries to pull the humeral head blank

A

superior

91
Q

deltoid and rc are a blank pair to bring arm overhead

A

syngergistic

92
Q

most important synergist with deltoid to raise arm overhead

A

supraspinatus

93
Q

greater compressive force reduces blank force

A

shear

94
Q

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

A

medially

95
Q

in coracoacromial space there is only blank space

A

4 dimes high

96
Q

impingement is a blank

A

etiology

97
Q

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

A

rotator cuff, deltoid

98
Q

bone spur on acromion can tear the blank muscle

A

supraspinatus

99
Q

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

A

capsule

100
Q

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

A

inferior subluxation

101
Q

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

A

negative pressure

102
Q

this envelopes the humeral head

A

labrum

103
Q

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

A

more, less

104
Q

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

A

64

105
Q

removed labrum there is a blank percent reduction in dislocation protection

A

20%

106
Q

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

A

compress

107
Q

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

A

centering

108
Q

part of capsule that restrains flexion

A

posterior capsule

109
Q

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

A

end range

110
Q

tight anterior capsule would cause a blank translation

A

obligate posterior

111
Q

tight posterior capsule would cause a blank translation

A

obligate anterior

112
Q

overly aggressive stretch can cause hypermobility and a blank

A

internal impingement (tendonitis)

113
Q

three parts of inferior glenohumeral ligament

A

anterior band, axillary pouch, posterior band

114
Q

flexion check reins

A

middle posterior capsule, anterior coracohumeral ligament

115
Q

abduction check reins

A

posterior coracohumeral ligament, inferior posterior capsule

116
Q

internal rotation check reins

A

superior/middle posterior capsule, middle glenohumeral ligament

117
Q

check reins for external rotation

A

superior/middle glenohumeral ligament, anterior/posterio coracohumeral ligament

118
Q

sghL is also a primary stabilizer to blank humeral head translation

A

anterior

119
Q

not much ligamentous restraint for blank translation of humeral head

A

posterior

120
Q

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

A

MGHL

121
Q

90 degrees scaption, blank stabilizes against anterior humeral head translation

A

IGHL

122
Q

IGHL during internal rotation goes blank

A

superior

123
Q

IGHL during external rotation goes blank

A

inferior

124
Q

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

A

opposite side (circle of instability)

PT 506 Kinesio / Biomechanics (14 decks)

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