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Kinesiology - Test 2 > Shoulder Complex I > Flashcards

Shoulder Complex I Flashcards

(41 cards)

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0
Q

What are the two main ligament groups of the SCJ and what do they check?

A
  1. Anterior/posterior ligaments - check anterior/posterior translation
  2. Interclavicular ligaments - check clavicular depression
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1
Q

What are the joints involved in shoulder elevation?

A

SCJ, GHJ, ACJ, STJ, T/S joint, costovertebral joint, costochondral joint, and costotransverse joint

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2
Q

What is a third ligament of the SCJ?

A

Costoclavicular ligament

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3
Q

What does the costoclavicular ligament limit and contribute to?

A

Limits elevation and contributes to inferior gliding of the clavicle

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4
Q

What is the shape of the SCJ joint?

A

Saddle - plane synovial

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5
Q

What motions in the frontal plane does the SCJ allow?

A

Elevation (48 degrees) and depression (10 degrees)

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6
Q

What motions in the transverse plane does the SCJ allow?

A

Protraction (20 degrees) and retraction (30 degrees)

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7
Q

What motions in the sagittal plane does the SCJ allow?

A

Posterior rotation (50 degrees) and anterior rotation (<10 degrees)

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8
Q

What are the four ligaments of the ACJ?

A
  1. Superior/inferior ligaments
  2. Coracoclavicular ligament
  3. Coracoacromial ligament
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9
Q

What does the superior ligament of the ACJ check?

A

Distal clavicle from moving posteriorly

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10
Q

What are the two CC ligaments?

A
  1. Conoid

2. Trapezoid

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11
Q

Which CC ligament is more medially?

A

Conoid

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12
Q

What are the functions of the conoid ligament?

A
  1. Resists distal clavicular superior motion
  2. Limits UR
  3. Posteriorly rotates clavicle
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13
Q

What are the functions of the trapezoid ligament?

A
  1. Limits posterior displacement of clavicle
  2. Limits UR
  3. Posteriorly rotates clavicle
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14
Q

Which ligament is the roof for the GHJ?

A

Coracoacromial ligament

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15
Q

What is the function of the CA ligament?

A

Protects subacromial bursa and RTC - more apt to get impingement syndrome if ligament is tight

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16
Q

How many motions occur at the ACJ?

17
Q

What are the three motions that occur at the ACJ?

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A
  1. Anterior/posterior tilting - 20 to 40 degrees
  2. UR/DR - 30 degrees
  3. IR/ER - 30 degrees
18
Q

What is the position of the STJ?

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A

Frontal plane - 30 to 45 degrees
Anterior tilt - 10 to 15 degrees
UR - 10 degrees

19
Q

What two joints allow for UR?

20
Q

What is scapular plane?

Study These Flashcards
A

Plane in which the scapula lies - 30 to 45 degrees

21
Q

What motion does the STJ allow?

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A

UR - 60 degrees

22
Q

Where does elevation/depression occur?

23
Q

Where does protraction/retraction occur?

24
Where does IR/ER occur?
ACJ
25
Where does anterior/posterior tilting occur?
ACJ
26
When does the scapula UR during ABD?
After 60 degrees of ABD
27
What is the purpose of scapulo-humeral rhythm?
Maintain optimal alignment of glenoid and humeral head, increase ROM, maintain optimal length-tension, and minimize active insufficiency
28
What factors of the GHJ prevent subluxation?
Rotator cuff muscles, deltoid, labrum, joint capsule, ligaments, and bone
29
What is the function of the labrum?
Increases depth of socket by 50%
30
What is the function of the capsule?
Creates intrarticular pressure
31
What are the mechanics of the capsule?
Lose anteriorly and inferiorly and tight superiorly
32
What are the four main ligaments of the GHJ?
1. Superior ligament 2. Middle ligament 3. Inferior ligament 4. Coracohumeral ligament
33
What is the function of the superior GH ligament?
Labrum to humerus connects with CH ligament and stabilizes anteriorly and inferiorly
34
What ligament is limited with low IR/ER?
Superior GH ligament
36
What is the function of the middle GH ligament?
Connects superior anterior labrum to anterior humerus and allows for anterior joint stability up to 60 degrees of ABD
37
What is the function of the inferior GH ligament?
45 degrees ABD resists inferior translation, ER resists anterior translation, and IR resists posterior translation
38
What is the function of the CH ligament?
Limits inferior translation
39
What is the orientation of the humeral head?
Medially, superiorly (130-150 degrees), and posteriorly (30 degrees) - more retroverted the more posterior it sits
40
What is scapulohumeral rhythm?
Elevation of the humerus with UR and posterior tilting of scapula - 2:1 ratio GHJ:STJ
41
What ligament is limited if the arm is ABD to 90 during IR/ER?
Inferior GH ligament

Kinesiology - Test 2 (4 decks)

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