Articulating Surfaces

Question 1

Describe the articulating surfaces of the sc joint

Answer 1

Convex medial end of clavicle and concave facet on manubrium (+costal cartilage of 1st rib)

• clavicle = larger than facet (part that articulates varies with arm height)
  - slightly concave horizontally
  - covered in fibrocartilage
• manubrium = covered in hyaline cartilage

Question 2

articulating surfaces of the ac joint

Answer 2

small oval facets on lateral clavicle and medial acromion

• covered in fibrocartilage
• intra-articular disc between