M+O 3 - TMJ Flashcards
1
Q
What is the TMJ?
A
synovial joint between temporal bone and mandible
2
Q
What makes up the synovial joint of the TMJ?
A
- joint capsule
- synovial membrane
- hyaline articular cartilage
- synovial fluid
3
Q
What is the glenoid fossa?
A
oval depression anterior to EAM, in the temporal bone
4
Q
What is the glenoid fossa bound by?
A
- articular eminence
- tympanic plate of temporal bone
5
Q
What are the 2 layers of the joint capsule?
A
- outer fibrous layer
- inner synovial membrane
6
Q
What does the synovial membrane do?
A
secretes synovial fluid to fill the joint spaces
7
Q
What does the lateral ligament restrict?
A
- restricts posterior, lateral and inferior movement
- restricts contra lateral medial movement
- limits the extent of a pure hinge movement
8
Q
What are the accessory ligaments of the TMJ?
A
- stylomandibular ligament
- sphenomandibular ligament
- pterygomandibular raphe
9
Q
What are the 5 zones of the articular disc?
A
- anterior extension
- posterior extension
- disc:
- anterior band
- intermediate zone
- posterior band
