Temporomandibular Joint Flashcards Preview

Gross II > Temporomandibular Joint > Flashcards

Flashcards in Temporomandibular Joint Deck (14):
1

What type of synovial joint is the TMJ

Ellipsoid jt

2

What are the 4 types of movements

Anteroposterior gliding
rotation around horizontal axis
lateral deviation
circumduction

3

What part of the jt capsule is lax

between disc and temporal bone-- allows for variety of movements

4

What part of the jt capsule is Tight

Between the disc and the condyle of mandible-- ensures that the disc fits tightly to head of mandible

5

How many jt spaces are in the TMJ

2-- superior and inferior

6

Which jt space has the most movement and why

the superior jt space, because its the most extensive

7

What are the two accessory ligaments for the TMJ

stylomandibular ligaments
sphenomandibular ligaments

8

Do either of the accessory ligaments actually connect to the TMJ

No

9

What nerves innervate the TMJ

auriculotemporal nerve -->branch of V3 -->branch of trigeminal

10

What happens during phase 1 of opening of the mouth

Disc and condyle slide anteriorly against mandibular fossa
Results in slight protraction and depression of mandible
Associated with motion of superior jt space

11

What occurs during phase 2 of opening the mouth

Hinge like rotation of the condylar process of the mandible against the articular disc
Associated with the motion of the inferior joint space

12

What does the motion of phase 2 result in

complete depression of the mandible

13

When is the TMJ most prone to dislocation, and which direction does it usually dislocate

When mandible is fully depressed
Displaced anterior articular tubercle

14

Where is pain from the TMJ usually referred to

Temporal region and external ear