Sternoclavicular joint

Question 1

joint classification

Answer 1

synovial saddle

Question 2

axis of movement

Answer 2

3

Question 3

articular surfaces

Answer 3

sternal end of clavicle
clavicular notch of sternum
costal cartilage of 1st rib

Question 4

3 features of sternal end of clavicle

Answer 4

covered in fibrocartilage
convex superior->inferior
concave anterior->posterior

Question 5

3 features of clavicular notch of sternum

Answer 5

covered in hyaline cartilage
concave superior->inferior
convex anterior->posterior

Question 6

4 features of joint capsule

Answer 6

fibrous capsule surrounding entire joint
attaching to articular margins of sternum and clavicle
relatively strong (apart from inferiorly)
strengthened by anterior and posterior SC ligaments and interclavicular ligament

Question 7

origin and insertion of intraarticular disk

Answer 7

upper border of sternal head of clavicle
costal cartilage of 1st rib

Question 8

function of intraarticular disk

Answer 8

improves congruency
shock absorption and force dissipation
stabilisation of joint

Question 9

ligaments

Answer 9

anterior SC
posterior SC
interclavicular
costoclavicular

Question 10

origin, insertion, function of anterior SC ligament

Answer 10

medial clavicle (anterior) -> sternum
reinforces anterior joint capsule

Question 11

origin, insertion, function of posterior SC ligament

Answer 11

medial clavicle (posterior) -> sternum
reinforces posterior joint capsule

Question 12

origin, insertion, function of interclavicular ligament

Answer 12

sternal end of clavicle -> sternal end of clavicle
strengthens capsule superiorly

Question 13

origin, insertion, function of costoclavicular ligament

Answer 13

inferior surface of medial clavicle -> costal cartilage of 1st rib
limits elevation of clavicle
prevents excess anterior/posterior movement of medial end of clavicle