Station 2: Shoulder Flashcards

1
Q

Normal Shoulder Flexion ROM?

A

150-180 degrees

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2
Q

Normal Shoulder Hyperextension ROM?

A

50 degrees

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3
Q

Normal Shoulder Lateral Rotation ROM?

A

90 degrees

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4
Q

Normal Shoulder Medial Rotation ROM?

A

70 degrees

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5
Q

How can the body compensate to allow for more shoulder flexion?

A

Extend trunk

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6
Q

How can the body compensate to allow for more shoulder extension?

A

Flex trunk

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7
Q

What type of joint is the acromioclavicular joint?

A

Plane

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8
Q

What type of joint is the sternoclavicular joint?

A

Shallow Saddle

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9
Q

What type of joint is the glenohumeral joint?

A

Ball and Socket

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10
Q

What is the scapulothoracic articulation?

A

Almost a joint but no bone on bone contact
Scapula moves over the ribs but doesn’t directly touch

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11
Q

Which two joints move in unison to move the shoulder girdle?

A

Sternoclavicular and Acromioclavicular joint

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12
Q

Can shoulder girdle movements be performed without arm?

A

Yes - elevation/depression, upward/downward rotation, protraction/retraction
Articulation is between scapula and clavicle so arm not needed

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13
Q

How can you describe shoulder stability/mobility

A

Less stable but more mobility because of the shallow socket

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14
Q

What does the glenoid labrum do?

A

Deepens cavity, creates more stability and suctions the socket. Very similar to acetabulum

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15
Q

Name the actions at the Glenohumeral Joint

A

Flexion/Extension, Adduction/Abduction, Horizontal Adduction/Abduction, External/Internal Rotation, Circumduction

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16
Q

Which muscles are the agonists of glenohumeral abduction?

A

Supraspinatus and Deltoid

17
Q

What is special about the Supraspinatus and Deltoid for glenohumeral abduction?

A

They are agonists at different degrees
- 0-30 degrees: Supraspinatus
- 30-90 degrees: deltoid

18
Q

Which muscle is the agonist of glenohumeral abduction at 0-30 degrees?

A

Supraspinatus

19
Q

Which muscle is the agonist of glenohumeral abduction at 30-90 degrees?

A

Deltoid

20
Q

What is a clear sign of a supraspinatus tear?

A

Patient cannot abduct at start. Supraspinatus is agonist for start

21
Q

Which muscle is the agonist of glenohumeral internal rotation?

A

Subscapularis

22
Q

What muscles are the agonist of glenohumeral external rotation?

A

Infraspinatus and Teres minor

23
Q

Are we stronger in glenohumeral internal or external rotation?

A

Internal rotation
3:2 strength balance ratio for internal rotators

24
Q

What is the strength balance ratio for internal/external rotation?

A

3:2
Internal rotators are 150% stronger than external rotators

25
Q

What are the actions of the Shoulder Girdle?

A

Elevation/Depression, Protraction/Retraction, Upward/Downward Rotation

26
Q

What is a bursar?

A

Pad of fat which stops friction

27
Q

Which muscles lay between the scapula and thoracic cage?

A

Serratus anterior and Subscapularis

28
Q

What is scapulohumeral Rhythm?

A

When the arm moves, the scapula has to move with it
(2 degrees of abduction, 1 degree of upward rotation of scapula)

29
Q
A