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Kinesiology > Shoulder > Flashcards

Shoulder Flashcards

1
Q

What is the shoulder complex consists of?

A

3 Bony Articulations
3 Functional Joint
20 Muscles

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2
Q

What are the 3 Bony Articulations of the shoulder complex?

A

SC Sternoclavicular
AC Acromioclavicular
GH Glenohumeral

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3
Q

What are the 3 Functional Joints of the shoulder complex?

A

Scapulothoracic
Suprahumeral
Bicipital groove

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4
Q

What are the two factors thats being inversely accounted for when studying the function of the shoulder complex?

A

Stability vs Mobility

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5
Q

What joint is the only bony attachment of the clavicle, scapula, and upper extremity to the axial skeleton?

A

Sternoclavicular Joint

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6
Q

What are the two articulation for Sternoclavicular Joint?

A

Medial end of clavicle

Manubrium of the sternum

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7
Q

What type of joint is Sternoclavicular Joint?

A

Synovial Saddle-Joint

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8
Q

How many DOF does Sternoclavicular Joint?

A

2-3 DOF

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9
Q

When does Sternoclavicular Joint become close-packed position?

A

Abducted to 90 degrees

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10
Q

How can you describe the joint surfaces of sternoclavicular joints?

A

SC joints are incongruent

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11
Q

What structure does the Sternoclavicular joint contain that increases it’s congruency?

A

Fibrocartilaginous disc or meniscus

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12
Q

What are the 4 functions of Sternoclavicular joint’s Fibrocartilaginous disc or meniscus?

A
  • Increase Congruency
  • Absorb medially directed forces
  • Divide into 2 separate cavities
  • Act like a hinge or pivot point during motion, complex set of motions
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13
Q

What does the SC joint’s articulating surfaces look like?

A

2 saddle-shaped surfaces

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14
Q

SC joint’s Joint Space is what shape and what direction is it open?

A

Wedge-shaped and open superiorly

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15
Q

The mechanical axes for motion of Sternoclavicular articulating surfaces is near the attachment of what ligament?

A

costoclavicular ligament

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16
Q

Where does the Upper portion of Sternoclavicular disk attach to?

A

postero-superior clavicle

17
Q

Where does the Lower portion of Sternoclavicular disk attach to?

A

Manubrium
1st costal cartilage
capsule

18
Q

What are the movements of the Sternoclavicular joint?

A

Elevation/Depression

Protraction/Retraction

19
Q

What plane does Sternoclavicular joint depression/elevation occur?

A

Frontal/Coronal Plane

20
Q

What plane does SC joint protraction/retraction occur?

A

Horizontal/transverse plane

21
Q

During SC disc protraction/retraction what moves on what?

A

SC disc and Medial end of clavicle moves together on the Manubrial facet

22
Q

In Concave-Convex Rule for SC Joint, what axis does elevation/depression occur?

A

Z-axis (A-P)

23
Q

In Concave-Convex Rule for SC Joint, what surface does Elevation/depression occur?

A

convex on concave

Kinesiology (2 decks)

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