Shoulder StudyGuide

Question 1

What type of joint & how many degrees of freedom???

• Sternoclavicular joint
• acromioclavicular joint
• glenohumeral joint

Answer 1

• sternoclavicular joint: saddle/basilar joint 3 degrees
• Acromioclavicular joint : plane/gliding joint 3 degrees
• glenohumeral joint: ball and socket 3 degrees (4)

Question 2

SCJ Movement, plane, axis

Answer 2

Protraction: horizontal plane about vertical axis
Elevation/Depression: frontal plane about AP axis
Rotation: Sagittarius plane about longitudinal axis (medial lateral axis)

Question 3

Explain convex concave for longitudinal and transverse part of clavicle and manubrium

Answer 3

Clavicle:
- longitudinal - convex
- horizontal - concave

Manubrium:
- longitudinal - concave
- horizontal convex

Question 4

Arthrokinematics of Clavicle:

Protraction

Answer 4

• clavicle concave
• roll & slide anteriorly

Question 5

Arthrokinematics of Clavicle:

Retraction

Answer 5

• clavicle concave
• roll & slide posterior

Question 6

Arthrokinematics of Clavicle:

Elevation

Answer 6

• clavicle convex
• roll superior
• slide inferior

Question 7

Arthrokinematics of Clavicle:

Depression

Answer 7

• clavicle convex
• roll inferior
• slide superior

Question 8

What clavicular ligaments restrict ELEVATION

Answer 8

• costoclavicular ligament becomes taut
• interclavicular ligament becomes slack

Question 9

What clavicular ligaments restrict DEPRESSION

Answer 9

• interclavicular ligament becomes taut
• Costoclavicular ligament becomes slack - check this CCL

Question 10

What clavicular ligaments restrict RETRACTION

Answer 10

• anterior capsular ligament becomes taut
• posterior capsular ligament becomes slack

Question 11

What clavicular ligaments restrict PROTRACTION

Answer 11

• posterior capsular ligament becomes taut
• anterior capsular ligament becomes slack

Question 12

Acromioclavicular Joint Ligaments

Answer 12

• Coracoclavicular: suspends scapula and rest of extremity from the clavicle
• made up of TRAPEZOID & CONOID
• Sup & Inf Acromioclavicular lig: reinforces the capsule that surrounds the AC joint

Question 13

ACJ motions, planes, and axis

Answer 13

• upward and downward in frontal plane about sagittal plane
• rotational adjustment motions in horizontal and sagittal planes
• upward rotation: shoulder abduction
• downward rotation: returns scap: addiction or extension

Question 14

Plane of the Scapula

Answer 14

• resting posture of the scapular
• 10 degrees anterior tilt
• 5-10 degrees upward rotation
• 30-40 degrees of internal rotation

Question 15

What occurs at the SCJ & ACJ during scapular ELEVATION

Answer 15

Clavicle SC Elevation + AC Downward Rotation (bottom of scapula down)

Question 16

What occurs at the SCJ & ACJ during scapular DEPRESSION

Answer 16

Clavicle SC depression + AC Upward Rotation

Question 17

What joint links the axial skeleton to the appendicular skeleton?

Answer 17

Sternoclavicular Joint

Question 18

What is meant by the term Scaption?

Answer 18

• elevation of the arm within the plane of the scapula (within the scapular plane)

Question 19

What occurs at the SCJ & ACJ during scapular PROTRACTION

Answer 19

• clavicle SC protraction + AC IR (forward reach)

Question 20

What occurs at the SCJ & ACJ during scapular RETRACTION

Answer 20

• Clavicle SC elevation + AC ER

Question 21

What occurs at the SCJ & ACJ during scapular UPWARD ROTATION

Answer 21

• clavicle SC elevation + AC upward rotation

Question 22

What occurs at the SCJ & ACJ during scapular DOWNWARD ROTATION

Answer 22

• clavicle SC depression + AC downward rotation

Question 23

Osteokinematics motions of the arm

• Protraction
• upward rotation
• downward rotation
• anterior tilting
• posterior tilting

Answer 23

• protraction: reaching forward
• upward rotation: arm elevation
• downward rotation: lowering arm
• anterior tilting: inf angle of the scapula moves backwards
• posterior tilting: inf angle of scapula moves forward