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OPTIM OCS: UQ > Shoulder Complex > Flashcards

Shoulder Complex Flashcards

(52 cards)

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1
Q

How many muscles attach to the scapula?

A

17

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2
Q

During R shoulder flexion, what movements occur in the upper thoracic vertebrae?

A
  • extension
  • R rotation
  • R sidebending
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3
Q

During R shoulder flexion, what movement occurs in ribs 1 and 2?

A

depression

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4
Q

During R shoulder flexion, what movement occurs in ribs 4-6?

A

elevation

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5
Q

The humeral head is ___x larger than the glenoid fossa

A

3-4x

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6
Q

The humeral head faces:

A

medial
posterior
superior

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7
Q

Humeral head: angle of inclination

A

130˚

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8
Q

Humeral retroversion:

A

30˚

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9
Q

Strength ratios of IR to ER in the shoulder

A

3 to 2

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10
Q

Women have (%) shoulder strength as men

A

40-65%

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11
Q

Only (%) of all new episodes of shoulder pain presenting in primary care show recovery by 6 months

A

50%

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12
Q

SC joint: degree of mobility

elevation and depression

A

30˚-40˚

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13
Q

SC joint: degree of mobility

rotation

A

40˚-50˚ (with ACJ)

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14
Q

SC joint: degree of mobility

Protraction/retraction:

A

~30˚

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15
Q

This joint is the only true skeletal articulation between the axial skeleton and appendicular upper limb

A

SC joint

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16
Q

SCJ shape, number of articulations

A

saddle shaped

diarthrodial jt

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17
Q

ACJ relies on this for support

A

ligamentous stability

  • superior/inferior AC ligaments
  • coracoclavicular ligaments (conoid/trapezoid)
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18
Q

ACJ mobility:

elevation and depression

A

30˚

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19
Q

ACJ mobility:

rotation

A

40˚-50˚ (with SCJ)

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20
Q

ACJ moves in 3 planes: what are they?

A
  • elevation/depression
  • rotation
  • protraction/retraction
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21
Q

Scapulothoracic joint is this type

Study These Flashcards
A

physiological articulation - no bone on bone connection

22
Q

Scapulothoracic joint: degree of upward rotation

23
Q

Scapulothoracic joint: degree of posterior tilt

24
Q

Scapulothoracic joint: degree of ER

25
Scapulohumeral rhythm: | ratio of GHJ to STJ motion
2:1 | 120˚ from GHJ, 60˚ from scapula
26
Scapulohumeral rhythm: | Which muscles initiate abduction?
deltoid | supraspinatus
27
Scapulohumeral rhythm: | This muscle sucks the scapula against the thorax
serratus
28
Scapulohumeral rhythm: | Pure GH motion in this range
0-45˚
29
Scapulohumeral rhythm: | From 45-60˚, what occurs?
- humerus slides inferiorly | - scapula begins to move
30
Scapulohumeral rhythm: | This occurs at approximately 75˚
humeral ER
31
Scapulohumeral rhythm: | At 110˚ this occurs
CC ligament tightens
32
Passive stabilizers of the shoulder
- bony shape - glenoid labrum - limited joint volume - intra-articular pressure - capsuloligamentous structures
33
GHJ Capsule: This alone provides little support without
other dynamic and static stabilization
34
GHJ Capsule: Capsular strength has this relationship to age
inverse: | older pt = weaker capsular tissue
35
GHJ Capsule: Capsular pattern
ER > ABD > IR
36
GHJ supporting structures: What are the static stabilizers of the joint?
- superior GH ligament - middle GH ligament - inferior GH ligament - coracohumeral ligament
37
GHJ supporting structures: | Superior GH ligament provides
inferior restraint with arm abducted
38
GHJ supporting structures: | middle GH ligament provides restraint to
- anterior translation | - ER
39
GHJ supporting structures: | Inferior GH ligament composed of these bands
anterior | posterior
40
Actions of levator scapulae
adduction downward rotation elevation
41
rhomboids actions
- adduction | - downward rotation
42
Rhomboids originate where?
nuchal ligament and SPs of C7-T5
43
Rhomboids insert where?
medial scapular border
44
Upper Trapezius actions
- upward rotation | - elevation
45
Serratus anterior actions
- holds scapula against ribcage - upward rotation - posterior tilt
46
Serratus anterior couples with this muscle for elevation
trapezius
47
Patients with impingement have shown: | decreased levels of ___ activity
serratus anterior
48
Patients with impingement have shown: | delay in firing of these muscles
middle/lower trapezius
49
Patients with impingement have shown: | dominance of these muscles resulting in a faulty scapuloumeral rhythm pattern
- UT | - LT
50
RTC muscles
- supraspinatus - infraspinatus - subscapularis - teres minor
51
If the long head of the biceps is torn, will have decreased ability with these movements
- elbow flexion - supination - shoulder abduction
52
Long head of the biceps has a significant role in ____ shoulder stability
anterior

OPTIM OCS: UQ (17 decks)

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