TMJ kinesis II

Question 0

What 3 structures do the articular disc attach?

Answer 0

1) medial & lateral poles of condyle
2) anterior joint capsule
3) lateral pterygoid muscle

Question 1

What to structures limit posterior translation of the TMJ joint?

Answer 1

anterior joint capsule & lateral pterygoid muscle (articular disc attaches to them) during closing

Question 2

Motion TMJ depression

Answer 2

1) condyle anterior rolls/spins on inferior disc

2) articular eminence glides anteriorly on superior disc

Question 3

what are the two structures that make up the bilaminar retrodiscal tissue?

Answer 3

superior lamina & inferior lamina

Question 4

function of superior lamina during opening & closing

Answer 4

• opening: allows disc to translate anteriorly -> disc glides forward c lateral pterygoid & superior lamina allows for anterior translation
• closing: assists repositioning of disc back into resting position
  therefore: superior lamina facilitates movement

Question 5

Function of inferior lamina

Answer 5

limits forward translation

Question 6

Joint capsule: loose vs. strong

Answer 6

loose: anteriorly***, medially, posteriorly
strong: laterally

Question 7

Where is the joint capsule most likely to dislocate?

Answer 7

anteriorly (that’s why we need the extra support of inferior lamina that resists anterior translation)

Question 8

Articular disc displacement

Answer 8

articular disc subluxes beyond articular eminence

- result: disc displacement c or s reduction