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Body Movements > TMJ > Flashcards

TMJ Flashcards

1
Q

TMJ

A

Temporomandibular Joint

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2
Q

What kind of joint is the TMJ

A

Synovial and Ellipsoid

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3
Q

Artificular surfaces are covered by

A

White Fibrocartilage

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4
Q

What separates the joint into 2 separate cavities?

A

Articular Disc

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5
Q

TMJ functions like two separate joints:

A

one above the disc and one below

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6
Q

Which two movements occur

A

Rotation and Gliding or Translation

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7
Q

Rotation occurs

A

in the Lower Cavity; from the beginning to midrange of movement

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8
Q

Gliding occurs

A

in the Upper Cavity; is a sliding movement of the condyle and disc along the slope of the articular eminence. It occurs from midrange to full range of opening

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9
Q

Capsule of TMJ

A

is thin and loose

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10
Q

Synovial membrane lines the

A

capsule, above and below the disc, but does not cover the disc

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11
Q

We have _ _ permanent teeth

A

32

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12
Q

What are the 3 Ligaments of the TMJ TSS

A

Temporomandibular
Sphenomandibular
Stylomandibular

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13
Q

Muscles of the TMJ are

A

Temporalis
Masseter
Lateral Pterygoid
Medial Pterygoid

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14
Q

Actions of the TMJ are

A

Depression (opening)
Elevation (closing)
Protrusion
Retraction
Lateral Deviation of the Mandible

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15
Q

Muscles that help depress the TMJ are

A

Lateral Pterygoid

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16
Q

Muscles that help elevate the TMJ are

A

Temporalis, Masseter, Medial Pterygoid

17
Q

Muscles that help with Protrusion

A

Lateral and Medial Pterygoid Muscles

18
Q

Muscles that help with Retraction

A

Temporalis (posterior fibres)

19
Q

Muscles that help with Lateral Deviation of the Mandible

A

Medial and Lateral Pterygoids perform Lateral Deviation to Opposite Side

20
Q

TMJ is very vascular so avoid using

A

heat

21
Q

Lateral Pterygoid work throughout opening and closing. On opening it _____ while on closing it _________

A

On opening, initially the superior head of the LP is relaxed and the lower heads are contracted. On closing, the opposite occursl

22
Q

What is attached to the front and the back of the Disc

A

Front: Superior Head of the LP
Back: Posterior Connective Tissue

23
Q

Causes of Locking in Opening

A

Dislocation of TMJ due to hypermobility

24
Q

Causes of Locking in Closing

A

Condyle can rotate but cannot glide forward due to:
1. Muscle Spasm of Temporalis and Masseter
2. Disc has slid in front of the condyle and blocks the forward movement

25
Q

How do you Palpate the Muscles:

A

Masseter, Temporalis, Condyles of the Mandible, Mastoid Process

26
Q

How do you check TMJ Mobility

A

Fingers in Ears and how
Palpate the Condyles and how

27
Q

What is the normal range of the TMJ depression (opening)

A

Two Knuckles
Three Fingers
43mmT

28
Q

TMJ Arthrokinematics

A

Rest Position
Rotation
Functional Opening
Translation
Closure (half way to close)

29
Q

In the Rest Position

A

Joint in loose pack position
Connective Tissue at Rest
Superior and Inferior heads of LP at Rest

30
Q

During Rotation

A

Mid Opening
Superior head of LP relaxed
Inferior head of LP contract

31
Q

During Functional Opening

A

Superior and inferior heads of LP contract to guide disc and condyle shortly forward
Posterior Connective Tissue in functional tightening

32
Q

During Translation

A

Full Opening
Disc and condyle glide anterior and caudal guided by joint surface
Superior and inferior heads of LP contract to guide disc and condyle fully forward
Posterior Connective Tissue Tightens

33
Q

Closure (half way to close)

A

Condyle joint surface glides posteriorly
Superior head of LP contract
Inferior head of LP relax
Posterior Connective Tissue returns to functional resting position

Body Movements (7 decks)

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