E1G

Question 1

sternoclavicular joint type

Answer 1

Type: synovial joint (saddle type)

Question 2

sternoclavicular joint articular surfaces

Answer 2

1. sternal end of clavicle articulates with clavicular notch of manubrium of sternum and a small part of 1st costal cartilage
2. articular surfaces are separated by an articular disc (fibrocartilage)  completely divides joint into 2 compartments

Question 3

sternoclavicular joint ligaments

Answer 3

1. anterior and posterior sternoclavicular ligaments  reinforce anterior and posterior aspects of joint capsule, respectively
2. interclavicular ligament: connects sternal ends of both clavicles across jugular (suprasternal) notch of sternum
3. costoclavicular ligament: strong ligament that extends from 1st rib and 1st costal cartilage to inferior surface of sternal end of clavicle

Question 4

sternoclavicular joint movements

Answer 4

1. protraction/retraction and elevation/depression of clavicle
2. some rotation around long axis of clavicle