Joints- Shoulder

Question 1

Scapulothoracic joint- articulation and function

Answer 1

-Not a true anatomical joint but a physiological joint which gathers the sternoclavicular joint and acromioclavicular joint.
It is the junction between the anterior surface of the scapula and the thoracic cage
- Action: Elevation, depression, retraction and axial rotation

Question 2

What type of joint is the Glenohumeral joint?

Answer 2

Synovial ball and socket joint- with a hyalin cartilage and synovial membrane

Question 3

What is the articulation of the Glenohumeral joint?

Answer 3

From the glenoid to anatomical neck of humerus and around the head

Question 4

Does the GH joint have a capsule?

Answer 4

Yes, it is like a look cylindrical sleeve which is stronger anteriorly but quite lax because it needs to provide for movement.

Question 5

Which ligaments are associated with the GH joint?

Answer 5

Ligaments around the region: Coracohumeral, coracoacromial ligament

Question 6

What is the blood supply for the GH joint?

Answer 6

branches of the axillary artery

Question 7

Nerve supply for GH joint?

Answer 7

axillary and musculocutoneous nerves

Question 8

What type of joint is the Sternoclavicular joint?

Answer 8

Saddle synovial joint

Question 9

What is the articulation of the Sternoclavicular joint?

Answer 9

Medial end of clavicle articulates with the end of sternum called manubrium

Question 10

Nerve supply for Sternoclavicular joint?

Answer 10

Medial supraclavicular nerve, nerve to subclavius

Question 11

Ligaments associated with the Sternoclavicular joint

Answer 11

Anterior and posterior SC ligaments, interclavicular ligament (between clavicle) and costoclavicular ligament (rib region towards clavicle)

Question 12

Does the SC joint contain a joint capsule?

Answer 12

Yes

Question 13

What does the intra-articular fibrocartilage disc do in the SC joint?

Answer 13

Improves congruency

Question 14

What type of joint is the Acromioclavicular joint?

Answer 14

Plane synovial joint

Question 15

What is the articulation of the Acromioclavicular joint?

Answer 15

Lateral end of the clavical and the acromion

Question 16

There’s a small wedge shaped fibrocartiloginous disc between the articulation, what does it do?

Answer 16

It helps compensate for the incongruity at the joint

Question 17

What ligaments are associated with the Acromioclavicular joint?

Answer 17

Either capsule thickening or superior and inferior acromioclavicular ligaments
Extracapsular ligament: Coracoclavicular ligaments

Question 18

Acromioclavicular joint contains a small intra articular disc, what does it do?

Answer 18

Increases congruency of the area

Question 19

Blood supply of the acromioclavicular joint

Answer 19

Suprascapular branch of the subclavian artery and acromial branch of the thoracoacromial trunk

Question 20

Nerve supply of the acromioclavicular joint

Answer 20

Lateral pectoral, suprascapular, axillary nerves

Question 21

Movements of the acromioclavicular joint

Answer 21

Elevatiom, depression, protraction, retraction and axial rotation