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Kines II: Exam 2 > Temporomandibular Joint > Flashcards

Temporomandibular Joint Flashcards

1
Q

where do the mandibular condyles sit?

A

in the mandibular fossa

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2
Q

what structures are anterior and posterior to the mandibular fossa?

A

articular eminence anteriorly

postglenoid tubercle posteriorly

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3
Q

what is a feature of the mandibular fossa?

A

it is thin bone

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4
Q

what structure has high forces when biting?

A

articular eminence

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5
Q

what kind of cartilage does the articular eminence contain?

A

fibrocartilage

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6
Q

where is most of the pressure directed to in the TMJ?

A

articular eminence

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7
Q

where can the posterior aspect of the mandibular condyle be felt?

A

in the external meatus

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8
Q

the articular surface of the mandible is considered congruent/incongruent

A

incongruent

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9
Q

mandible is concave or convex?

A

convex

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10
Q

is the articular eminence concave or convex?

A

convex

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11
Q

where should you put your fingers to palpate the TMJ?

A

tragus

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12
Q

what does the inferior TMJ consist of?

A

mandibular condyle and inferior surface of disc

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13
Q

what does the superior TMJ consist of?

A

articular eminence and superior surface of disc?

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14
Q

what is the classification of the inferior TMJ?

A

hinge

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15
Q

what is the classification of the superior TMJ?

A

gliding

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16
Q

when do you get the anterior translation of the joint?

A

open mouth wider

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17
Q

what CAN’T the articular disc do?

A

repair and remodel

18
Q

what does the anterior joint capsule restrict?

A

posterior translation

19
Q

what does the inferior lamina of the bilaminar retrodiscal pad limit?

A

forward translation of the mandible

20
Q

where is the joint capsule the most strong?

most dislocated in which direction?

A

laterally

anterior

21
Q

what movements do the temporomandibular ligament limit?

A

downward translation, posterior translation, and rotation during mandibular depression

22
Q

what movements do the stylomandibular ligament limit?

A

protrusion

23
Q

what movements do the sphenomandibular ligament limit?

A

anterior translation

24
Q

what gliding kinematics can occur?

A

anterior and lateral glide

25
Q

where does the lateral pterydoid attach and what does it control?

A

anterior disc

eccentric control of disc

26
Q

protrusion is impt for opening/closing of mouth.

A

opening

27
Q

retrusion is impt for opening/closing of mouth.

A

closing

28
Q

what is protrusion limited by?

A

bilaminar retrodiscal tissue

29
Q

what is retrusion limited by?

A

temporomandibular ligament

compression of the retrodiscal area

30
Q

what structures are being pulled during protrusion?

A

articular eminence, superior disc

31
Q

how much ROM of lateral excursion is there?

A

8-11 mm

32
Q

what are the arthrokinematic motions of lateral excursion?

A

spin ipsilaterally

translation contralaterally

33
Q

what occurs to the mandible during deviation?

A

S curved

comes back to midline

34
Q

what occurs to the mandible during deflection?

A

C curved

does not return back to midline

35
Q

action of suprahyoid muscle group.

A

depression of mandible

36
Q

action of infrahyoid muscle group.

A

stabilizes the hyoid bone

37
Q

action of masseter

A

closing, retrusion

38
Q

action of temporalis

A

closing, retrusion, ipsilateral deviation

39
Q

action of lateral pterygoid

A

protrusion, contralateral deviation, eccentric control disc upon closing

40
Q

action of medial pterygoid

A

protrusion, contralateral deviation

41
Q

what occurs during forward head posture?

A

posterior rotation of head
retrusion
compression of retrodiscal pad
masseter muscle overworks to close jaw

Kines II: Exam 2 (4 decks)

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