Sternoclavicular joint Flashcards
1
Q
what type of joint is it?
A
saddle
2
Q
movement
enabled by ___
A
gliding
articular disc between sternum + clavicle
3
Q
ligaments
A
- anterior sternoclavicular ligament
- posterior “
- costoclavicular ligament - limits elevation of shoulder
- interclavicular ligament - limits depression of shoulder
4
Q
artiulating surfaces
A
- clavicle-manubrium of sternum
- costal cartilage of 1st rib
5
Q
blood supply
A
- internal thoracic artery
- suprascapular artery
6
Q
innervation
A
branches from nerve to subclavius
7
Q
action / mobility
A
- depression + elevation of shoulder + arm
- protraction + retraction of arm - reaching for an object
8
Q
is it a stable joint?
A
yes
- strong joint capsule
- ligamentous support
9
Q
how common is sternoclavicular dislocation?
A
very rare - clavicle fractures rather than dislocation
costoclavicular ligament + srticular disc transfer forces to sternum
