3: AC and SC Joints

Question 1

What type of joint is the sternoclavicular joint?

Answer 1

Saddle

Question 2

What is the open packed position for the sternoclavicular joint?

Answer 2

Arm at side (physiologic rest position)

Question 3

What is the closed packed position for the sternoclavicular joint?

Answer 3

Full shoulder elevation

Question 4

What type of joint is the acromioclavicular joint?

Answer 4

Plane

Question 5

With the AC joint, the lateral end of the clavicle is ____ and the acromion side is ____

Answer 5

Convex, concave

Question 6

What is the open packed position for the acromioclavicular joint?

Answer 6

Arm at side (physiologic rest position)

Question 7

What is the close packed position for the acromioclavicular joint?

Answer 7

90 degrees shoulder ABduction

Question 8

What are the passive ROM patterns for the SC joint?

Answer 8

Elevation = 45
Depression = 15
Protraction = 15
Retraction = 15
Posterior rotation = 45

Question 9

What is the major stabilizing ligaments of the ACJ?

Answer 9

Coracoclavicular ligaments

Question 10

What two ligaments are involved in the acromioclavicular joint?

Answer 10

acromioclavicular and coracoclavicular ligaments

Question 11

What is the most common cause of AC joint pain?

Answer 11

Osteoarthritis

Question 12

How will a patient with AC joint pain typically present?

Answer 12

Pain on palpation of AC joint
Pain on cross body adduction
X ray showing degenerative change

Question 13

What can Chiropractic do to treat AC joint pain?

Answer 13

Mobilization or manipulation
Stretching of pectoralis minor

Question 14

What is the most common cause of AC joint sprain or separation?

Answer 14

Fall on the point of the shoulder

Question 15

What are the grades of AC joint sprain/separations?

Answer 15

Type I = Sprain
Type II = Separation
Type III = Separation

Question 16

A type I AC joint injury is a (Sprain/Separation)?

Answer 16

Sprain

Question 17

A type II/III AC joint injury is a (Sprain/Separation)?

Answer 17

Separation

Question 18

What characterizes a type II AC joint separation?

Answer 18

Ruptured AC ligament with INCOMPLETE injury to coracoclavicular ligament

Question 19

What will be the radiographic characteristic of the coracoclavicular interspace in a type II AC joint separation?

Answer 19

Coracoclavicular interspace will be equal in both shoulders

Question 20

What is the treatment for a type I AC joint sprain?

Answer 20

Ice and rest with strengthening exercises

Question 21

What is the treatment for a type II AC joint sprain?

Answer 21

Ice and rest with strengthening exercises and possible bracing

Question 22

What characterizes a type III AC joint separation?

Answer 22

Ruptured AC, CC, and joint capsule

Question 23

What will a radiograph present as with a type III AC joint separation?

Answer 23

• Elevation of the distal clavicle is greater than the width of the clavicle
• Coracoclavicular interspace is greater in the injured shoulder

Question 24

The coracoclavicular interspace is (Lesser/Greater) in the affected shoulder and indicates a minimal type ____ separation?

Answer 24

Greater, III

Question 25

Type IV, V and VI AC joint separations require ____ treatment?

Answer 25

Surgical