TMJ Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

when the jaw opens wide what stops it from going into the neck?

A

Hinge and slide motion

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2
Q

what kind of joint is between the temporal bone and the mandible?

A

synovial joint

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3
Q

Name this part of a synovial joint

A

joint capsule

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4
Q

Name this part of a synovial joint

A

synovial membrane

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5
Q

Name this part of a synovial joint

A

hyaline articular cartilage

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6
Q

Name this part of a synovial joint

A

synovial fluid

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7
Q

what is the function of the hyaline articular cartilage in a synovial joint?

A

cushions the surface

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8
Q

movement at the TMJ is limited to? 2

A

contralateral TMJ
teeth

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9
Q

the TMJ is capable of what 2 movements?

A

hinge
slide

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10
Q

the TMJ is capable of hinge and slide movements so its called a ? joint

A

ginglymoarthroidial joint

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11
Q

name this bone that’s part of the TMJ

A

temporal bone

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12
Q

name this part of the TMJ

A

glenoid fossa

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13
Q

name this part of the TMJ

A

articular eminence

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14
Q

name this bone that’s part of the TMJ

A

zygomatic bone

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15
Q

name this part of the TMJ

A

condyle

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16
Q

the glenoid fossa is thin so what happens to the masticatory forces?

A

transmitted through the teeth

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17
Q

which side of the condyle is wider?

A

medial

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18
Q

how is the TMJ a special synovial joint? 2

A

2 compartments
fibrous cartilage not hyaline cartilage

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19
Q

name this part of the TMJ

A

joint capsule

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20
Q

the joint capsule is attached to what?

A

the glenoid fossa

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21
Q

the joint capsule is continuous with what?

A

the disc

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22
Q

what are the 2 layers of the joint capsule

A

outer fibrous layer
inner synovial membrane

23
Q

what is the function of the synovial membrane?

A

secretes synovial fluid to fill joint spaces

24
Q

what does the synovial fluid do? 3

A

contains proteoglycans
lubricant
nutritive

25
Q

name this part of the TMJ

A

lateral ligament

26
Q

the lateral ligament connects? 2

A

lateral surface of articular eminence to posterior surface of condyle

27
Q

what does the lateral ligament do?

A

restricts movement

28
Q

what is a raphe?

A

union between 2 muscles

29
Q

Name this accessory ligament

A

Stylomandibular ligament

30
Q

Name this accessory ligament

A

Sphenomandibular ligament

31
Q

Name this accessory ligament

A

Pterygomandibular raphe

32
Q

Which accessory ligament is important when giving anaesthesia and why??

A

Sphenomandibular ligament as runs close to alveolar bone

33
Q

Name this structure of TMJ

A

Articular disc

34
Q

What is the articular disc? 2

A

Dense fibrous disc
Divides joint into 2 compartments

35
Q

What r the 3 zones of the articular disc?

A

Anterior extension
Posterior extension
Disc

36
Q

What r the three zones of the disc part of the articular disc?

A

Posterior band
Intermediate band
Anterior band

37
Q

How many parts does the anterior extension of the articular disc have?

A

1

38
Q

The anterior extension of the articular disc is continuous with what?

A

Superior head of lateral Pterygoid muscle

39
Q

How many parts does the posterior extension of the articular disc have?

A

2

40
Q

What r the two parts of the posterior extension of the articular disc?

A

Upper layer: vascular and elastic

Lower layer: fibrous

41
Q

The posterior extension is ? 2

A

Densely innervated
Vascular

42
Q

Why does clicking at the TMJ not normally cause pain?

A

The joint capsule is richly innervated but not in the disc

43
Q

What is nociception?

A

Process of activating nerves that give rise to the sensation of pain

44
Q

What is proprioception?

A

Process of knowing where your body is

45
Q

Which nerve innervates the TMJ

A

Trigeminal, mandibular division
CNV3

46
Q

Which branches of CNV3 supply the TMJ? 3

A

Auriculotemporal
Masseteric
Deep temporal

47
Q

Which arteries supply the TMJ with blood? 2

A

Superficial temporal artery
Maxillary artery

48
Q

Name this part of the articular disc of TMJ

A

Posterior extension

49
Q

Name this part of the articular disc of TMJ

A

Posterior band

50
Q

Name this part of the articular disc of TMJ

A

Intermediate zone

51
Q

Name this part of the articular disc of TMJ

A

Anterior band

52
Q

Name this part of the articular disc of TMJ

A

Anterior extension

53
Q

The articular disc divides the joint into what 2 compartments?

A

Lower hinge
Upper slide

54
Q

What causes a clicking sound from TMJ?

A

Anterior disc displacement