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MSK 2 > EXAM 3 - hyper mobile shoulder > Flashcards

EXAM 3 - hyper mobile shoulder Flashcards

1
Q

what is the balance stability angle

A

the max angle between the glenoid center line and the net humeral joint reaction force before the humerous dislocates

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2
Q

what is the anterior compressor

A

subscap

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3
Q

what is the posterior compressor

A

infra and teres minor

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4
Q

what is the superior compressor

A

supra

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5
Q

what does concavity have to do with stablity

A

deeper the concavity the greater the displacement force for a compressive load

the greater the displacement force needed

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6
Q

what is the stablity ratio

A

displacing force/compressive load

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7
Q

what are the passive restraints to the shoulder

A

labrum

boney geometry

capsulo-ligamentous structures

negative intra-art pressure

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8
Q

what direction does the humeral head face

A

superior
medially
posteriorly

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9
Q

what is the function of scapular rotation

A

allows the glenoid to remain under the humeral head

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10
Q

ER - 0 restriants

A

CH
SGHL
subscapularis

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11
Q

ER - 45 restraints

A

MGHL

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12
Q

ER - 90 restraints

A

anterior band of IGHL

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13
Q

when is the subscap an effective restraint

A

when the arm is at its side

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14
Q

rotator interval

A

a triangluar area between the subscap and the base of the coracoid

this is one of the most common areas of disloaction

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15
Q

what is the action of the biceps tendon

A

increases torsional ridgity

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16
Q

what is torsional ridgity

A

the ability of an object to resist twisting when acted upon by an external force, torque

17
Q

what happens to the bicep tendon with there is a slap lesion

A

the effect of the biceps tendon is lost

18
Q

what is the most traumatic type of shoulder instablity

A

posterior

19
Q

onset of instablity

A

traumatic

atraumatic

repetitive microtrauma/overuse

20
Q

what does TUBS stand for

A

traumatic

unitlateral

bankart lesion

surgical repair

21
Q

what is a bankart lesion

A

a tear that happens in the lower rim of the labrum.

the rim of the glenoid is being torn off and the humeral head is moving forward

22
Q

AMBRI stands for

A

atraumatic

Multidirectional

bilateral

rehab

inferior capsular shift

23
Q

how do we test for multi-direction instability

A

sulcus sign

24
Q

Anterior mechnism

A

Posteriorly directed force with the arm abd and ER

this can also occur with issue from behind

25
Q

Posterior mechnism

A

Posterior directed force with arm flexed and IR

26
Q

inferior mechanism

A

Inferior force with the arm in abd

27
Q

how to test for general glenoid instability

A

load and shift test

28
Q

how to test for anterior instability

A

anterior drawer

anterior apprehension

29
Q

how to test for posterior instablity

A

posterior drawer

combo: posterior apprehension, jerk test, kim test

30
Q

slap lesion MOI

A

o Fall on outstretched arm
o Traction on long head of biceps associated with overhead throwing activity
o Internal impingement
o “Peel back” of labrum due to twisting of biceps tendon during abduction/ER

31
Q

slap lesion symptoms

A

o Pain & mechanical catching/grinding (50% of cases)

32
Q

test we can use for a slap lesion

A

o O’Brien’s test
o Crank test
o Biceps load test
o Biceps load test II
anterior slide test

33
Q

what is a positive obrein’s test

A

AC pain or pain/click deep in the joint

34
Q

top of the shoulder pain obrein’s

A

AC joint lesion

35
Q

what is a positive anterior slide test

A

pain and/or click in front of shoulder in front of shoulder

36
Q

crank test arm position

A

160 abd

37
Q

biceps load positive test

A

pain with biceps activation

38
Q

what are the two tests that look at the long head of the biceps tendon

A

speed test

yergasons

MSK 2 (15 decks)

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