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711 Kinesiology > TMJ > Flashcards

TMJ Flashcards

1
Q

temporomandiublar joint

A
  • synovial hinge like joint
  • fibrocartilage vs hyaline
  • articular disc
  • motions: elevation/depression - lateral deviation
  • protrusion/retrustion
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2
Q

temporomandibular articular surfaces are covered in ____ instead of hyaline

A

fibrocartilage

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3
Q

temporal and mandibular make up the _______ ______ and provide muscular attachment

A

articular surfaces

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4
Q

lateral pterygoid plate of the sphenoid promised origin for

A

lateral and medial pterygoids

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5
Q

major muscles that elevates the mandible

A

masseter and temporalis

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6
Q

part of the mandible

A

mandiubar condole , coronoid process and angle

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7
Q

purpose of inferior and superior joint cavities

A

helps the disc - mobile

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8
Q

purpose of retrodical laminae

A

tether the disc and bring it back into closed position after opening

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9
Q

dis glides ___ as the jaw opens

A

anteriorly

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10
Q

depression - opening of jaw ROM

A

35-55mm

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11
Q

profusion - jaw forward ROM

A

6-8mm

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12
Q

lateral deviation - side to side ROM

A

approx 10 mm to either side

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13
Q

Joint axis of the mandible

A

horizontal
anterior/posterior
vertical

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14
Q

horizontal axis allows for

A

depression and elevation

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15
Q

anterior. and posterior axis allows for

A

chewing - rocking motion

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16
Q

vertical axis allows for

A

lateral deviation

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17
Q

motion of lateral deviation

A

spin ipsilateral and protrude opposite

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18
Q

true or false: mandible is always the joint partner that moves

A

true

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19
Q

inferior joint arthrokinematics

A

rolls posteriorly during depress so glides anteriorly

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20
Q

superior joint arthrokinematics

A

anterior translation and slight inferior translation

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21
Q

purpose of retrodiskal fibers

A

restrain further translation

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22
Q

closed pack position

A

teeth closed

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23
Q

resting postion (open pack)

A

mouth slightly open, lips together, teeth not in contact tongue resting behind top teeth

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24
Q

capsular pattern

A

limitation of mouth opening

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25
Q

occlusal positioned

A

gentle contact of teeth

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26
Q

forward head may cause

A
  • posterior tension
  • increased compression
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27
Q

forward head posture (FHP)

A

upper cervical spine extension is likely linked to TMJ dysfunction because of its effect on the soft tissues that retried the jaw and its effect (stress/compression) on the joint from malpositioning

28
Q

having the jaw in more traded position during forward lean of the neck may result in increase or decrease of JRF?

A

higher joint reaction forces

29
Q

other signs of TMJ when you have a forward head posture?

A
  • stretching infrahyoid muscles
  • alters length tension of masticatory muscles (muscle tightening)
30
Q

muscles of mastication

A
  • masseter
  • temporalis
  • lateral/medial pterygoid
31
Q

accessory muscle of the TMJ

A
  • buccinator
  • tongue
  • suprahyoid muscles
    -infrahyoid muscles
32
Q

nerves innervating masticators

A

CN V - mandibular branch

33
Q

nerve innervating infrahyoids

A

ventral rami of C1-C3

34
Q

nerve innervating suprahyoids

A

CN V, VII, XII

35
Q

temporalis actions

A
  • elevate
    -retrusion
    -ipsilateral deviation
36
Q

Masseter fibers and what do they do specifically and the purpose of each is to?

A
  • Superficial: Protrusion
    -Deep: Retrusion
  • stabilize and elevate mandible
37
Q

massester action

A
  • elevate
  • protrude
    -retrude
  • ipsilateral deviate
38
Q

Temporalis and masseter both innervated by

A

CN V - mandibular branch

39
Q

muscles of protrusion

A

pterygoids

40
Q

lateral pterygiod runs horizontal and does what?

A

pull the disk forward

41
Q

superior head of lateral ptyergoid runs from

A

pterygoid plate to castle disk

42
Q

inferior head of lateral ptyergoid runs from

A

pterygiod plate to the neck of the mandible

43
Q

medial pterygoid runs superiorly ——

A

lateral pterygoid plate to mineral surface of ramus of mandible near the angle (superficial head to maxilla)

44
Q

what mandibular motions would the lateral or medial pterygoid cause if both sides contract

A

protrusion

45
Q

what mandibular motions would the lateral or medial pterygoid cause if one side contracts

A

contralateral lateral deviation

46
Q

what head causes disc anterior glide

A

lateral pterygoid superior head

47
Q

how does the muscles of masseter and pterygoid influence lateral deviation

A

pterygoids to opposite side and masseter to ipsilateral side

48
Q

the line of pull of temporalis during lateral deviation

A

minimal ability to ipsilaterally deviate - mostly elevates

49
Q

what muscles assist with madnbiular depression and innervated by

A

suprahyoids - CN V, VII, XII

50
Q

what muscles tagline the hyoid bone to provide stable base for suprahyoids and innervated by?

A

infrahyoids - Ventral rami C1-C2-C3

51
Q

deep fibers of masseter stabilize the jaw in

A

anterior - posterior

52
Q

tmepralis dual action - Posterior helps with and both heads does?

A

posterior helps with recursion and both heads will elevate

53
Q

supra hyoid muscles does

A

depression of the jaw (open mouth)

54
Q

importance of tongue

A

taste, resonance, pronunciation, food placement and swallowing

55
Q

true or false: tongue is useful for correcting of lateral deviation

A

true: tip of tongue to roof of mouth can facilitate symmetric opening of the mouth

56
Q

working side

A

side of chewing

57
Q

balancing side

A

side without food and sustain higher loads than chewing side

58
Q

chewing stroke: 1-2 and 3-4

A

1-2: depression + deviation
3-4: elevation + deviation

59
Q

why does balancing side get a higher compression force?

A

relative distraction of working side with up to 2x increased compression force on balancing side

60
Q

describe anterior displacement with reduction

A
  • opening of the mouth (disc displaced) - anterior to the condyle cause opening clicking
  • closing of the mouth results in disc dislocation (closing click)
61
Q

describe anterior displacement without reduction

A

the posterior ligament is torn (retrodisca lamina) resulting the moving of the jaw posteriorly (lock jaw)

62
Q

TMJ

A

joint

63
Q

causes of TMD (dysfunction)

A
  • bruxism
    -stress, emotional
  • forward head posture
    CNS sensitization
64
Q

bruxism

A

grinding at night

65
Q
A

711 Kinesiology (11 decks)

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