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Foundations Unit 3: Posture and UE > Shoulder Girdle > Flashcards

Shoulder Girdle Flashcards

1
Q

what is the concept of dynamic stability? (mobility and structure)

A
  • greatest mobility of any joint
  • not structurally very stable
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2
Q

what is the scapular resting position?

A
  • 30 degree scaption plane
  • 20 degree anterior tilt
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3
Q

describe the structure of the humeral head

A

30 degree retroversion in line with the scaption plane

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4
Q

describe the orientation of the scapula and clavicle

A
  • 30-35 scaption plane
  • 20 degree clavicle
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5
Q

what would be the result if our humerus didn’t have a 30 degree retroversion?

A

our curls would be IR 30 deg

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6
Q

which joint improves available shoulder ROM

A

STJ

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7
Q

which joint maintains favorable deltoid and RC muscle LT relationships?

A

STJ

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8
Q

which joint provides stability for overhead work and allows for UE shock absorption?

A

STJ

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9
Q

which joint permits elevation of the body with UE weight bearing

A

STJ

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10
Q

how are the scapular motions named?

A

for the glenoid movement

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11
Q

name and describe the disorder that the kid from stranger things has

A

Cleidocranial Dysplasia/Dysostosis - partially missing clavicle leads to excellent mobility and severely limited stability

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12
Q

what is the only joint that truly connects the UE with the thorax? describe the joint

A

SCJ - strong ligamentous structure causes the clavicle to fx before dislocation of the joint

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13
Q

How many degrees of freedom at the SCJ? what are the motions?

A

3 degrees of freedom

  • elevation/depression
  • protraction/retraction
  • posterior rotation
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14
Q

what is the shape of the SCJ?

A

saddle

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15
Q

describe the SCJ arthokinematics of elevation/depression

A
  • convex on concave - sup roll/inf glide
  • convex on concave - inf roll/sup glide
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16
Q

describe the SCJ arthrokinematics of retraction

A

concave on convex - post roll/slide

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17
Q

what are the two major functions of the ACJ

A
  • key to the alignment of the glenoid
  • contributes to scap elevation and up rotation for overhead acts
18
Q

how many degrees of freedom at the ACJ and what are the motions?

A

3 degrees of freedom

  1. up/down rotation
  2. IR/ER - horizontal plane
  3. A/P tilting - sagittal plane
19
Q

scapular winging is noted in which ACJ movement

A

IR/ER - horizontal plane movement

20
Q

scapular tipping is noted in which ACJ movement?

A

A/P tipping - sagittal plane movment

21
Q

describe scapular upward rotation at the SCJ and ACJ

A

SC elevation and AC up rotation

22
Q

describe scapular elevation at the SCJ and ACJ

A

SC elevation and AC down rot

23
Q

describe scapular protraction at the SCJ and ACJ

A

SC protraction and AC IR

24
Q

what are the major scapular elevators?

A

UT, levator, rhomboids

25
Q

what are the major scapular depressors?

A
  1. low traps and lats
  2. pec minor and subclavius
26
Q

what movement helps you push up out of a chair?

A

scapular depressors reverse action concentric

27
Q

what are the major scapular protractors?

A

serratus anterior

28
Q

what are the major scapular retractors?

A

Mid trap, rhomboids, low trap

29
Q

what are the four force coupling muscles that provide scapular upward rotationa and GH abduction?

A

UT, LT, SA, Delt

30
Q

what are the 5 major force coupling muscles for scapular downward rotation with GH adduction?

A

rhomboids, lats, teres major, infraspinatus, posterior delt

31
Q

what are the major muscle groups utilized in a seated push up - up phase? (3)

A
  • everything is concentric reverse action
    • scap depressors
    • GH flexors
    • GH adductors
32
Q

what are the major muscle groups utilized in a seated push up - down phase? (3)

A
  • everything is eccentric reverse action
    • scap depressors
    • GH flexors
    • GH adductors
33
Q

what are the major muscle groups utilized in an up-phase pull up? (5)

A
  • everything is concentric reverse action
    • scap retractors
    • scap down rotators
    • scap depressors
    • GH extensors
    • GH adductors
34
Q

what are the major muscle groups utilized in a down-phase pull up? (5)

A

everything is eccentric reverse action

  1. scap retractors
  2. scap down rotators
  3. scap depressors
  4. GH extensors
  5. GH adductors
35
Q

what are the major muscle groups utilized in a down-phase push up? (4)

A

everything is eccentric reverse action

  1. scap protractors
  2. scap up rotators
  3. GH flexors
  4. GH horizontal addcutors
36
Q

what are the major muscle groups involved in an up-phase push up? (4)

A

everything is concentric reverse action

  1. scap protractors
  2. scap up rotators
  3. GH flexors
  4. GH horizontal adductors
37
Q

what are the major muscle groups involved in reaching back for the wheels in a wheel chair? (6)

A

everything is concentric normal action

  1. scap retractors
  2. scap downward rotators
  3. GH extensors
  4. GH IRs
  5. GH horizontal abductors
  6. GH abductors
38
Q

what are the major muscle groups involved in pushing wheels in a wheel chair? (6)

A

everything is concentric normal action

  1. scap protractors
  2. scap upward rotators
  3. GH flexors
  4. GH ERs
  5. GH horizontal adductors
  6. GH adductors
39
Q

what are the major muscles involved in advancing crutches? (4)

A

everything is concentric normal action

  1. scap protractors
  2. scap upward rotators
  3. GH flexors
  4. GH horizontal adductors
40
Q

what are the major muscles involved in elevating oneself on crutches without advancement? (3)

A

everything is concentric reverse action

  1. scap depressors
  2. GH flexors
  3. GH adductors
41
Q

what are the major muscle groups involved in advancement with crutches? (4)

A

everything is reverse action, but muscle action varies

  1. scap retractors - concentric
  2. scap depressors - isometric
  3. GH extensors - concentric
  4. GH adductors - isometric

Foundations Unit 3: Posture and UE (8 decks)

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