Sternoclavicular Joint

Question 1

What is the Sternoclavicular Joint?

Answer 1

Stable, synovial articulation between the sternal end of the clavicle and the manubrium of the sternum and the 1st costal cartilage.

Question 2

What type of joint is the Sternoclavicular Joint?

Answer 2

saddle joint but functions as a ball and socket joint.

Question 3

What is the Sternoclavicular Joint divided by?

Answer 3

by an articular disc.

Question 4

The great strength of the Sternoclavicular Joint is a consequence of what three attachements?

Answer 4

1. Anterior
2. Posterior
3. Interclavicular ligaments.

Question 5

What is the purpose of the articular disc?

Answer 5

1. Shock absorber.

2. Separates the SC joint into two compartments.

Question 6

The Sternoclavicular Joint is the only articulation between what?

Answer 6

The upper limb and the axial skeleton.

Question 7

What surrounds the SC Joint?

Answer 7

Joint Capsule, including the epiphysis at the sternal end of the clavicle.

Question 8

What lines the internal surfaces of the fibrous layer of the capsule?

Answer 8

Synovial membrane.

Question 9

What do the Anterior and Posterior SC Ligaments do?

Answer 9

reinforce the joint capsule anteriorly and posteriorly.

Question 10

What does the interaclavicular ligament do?

Answer 10

strengthens the capsule superiorly.

Question 11

What does the costoclavicular ligament do?

Answer 11

Anchors the inferior surface of the sternal end of the clavicle to the first rib and its costal cartilage, limiting elevation of the pectoral girdle.

Question 12

What makes up the Sternoclavicular Joint?

Answer 12

1. Anterior SC Ligament
2. Posterior SC Ligament
3. Interclavicular Ligament
4. Costoclavicular Ligament