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Occlusion > Mechanoreception > Flashcards

Mechanoreception Flashcards

1
Q

What is mechanoreception

A

detection of stimuli

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2
Q

What is a mechanoreceptor?

A

Peripheral receptor

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3
Q

What are the 3 mechanical distortions?

A

Pressure
Vibration
Tension

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4
Q

Define exteroreception

A

info about things coming into contact with the body

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5
Q

Define proprioception

A

awareness of self position

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6
Q

define touch

A

sensory experience when mechanoreceptors are excited - involves CNS

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7
Q

The 4 oro-facial mechanoreceptors

A

mucosa
PDL
muscles
joint receptors

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8
Q

What is the effect of stimulation of mechanoreceptors?

A

Touch sensation
Reflexes
Modulation of other senses

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9
Q

What is a receptive field?

A

the area/space where a stimulus will affect the receptor

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10
Q

What are the 2 types of rapidly adapting mechanoreceptors

A 
Meissner's Corpuscle (RA I)
Pacinian Corpuscle (RA II)
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11
Q

What are the 2 types of slow adapting mechanoreceptors

A 
Merkel Cells (SA I)
Ruffini Ending (SA II)
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12
Q

What do 2 point discrimination thresholds reflect?

A

The innervation density

Size of receptive field

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13
Q

What 2 roles do PDL mechanoreceptors have?

A

exteroceptive role and proprioceptive role

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14
Q

Describe PDL mechanoreceptors in terms of Nerve Endings

A

RUFFINI nerve endings (slow adapting with large receptive field)

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15
Q

Describe PDL mechanoreceptors in terms of afferents

A

A-beta axons

300 per tooth

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16
Q

Describe PDL mechanoreceptors in terms of cell bodies

A

TRIGEMINAL GANGLION

MESENCEPHALIC NUCLEUS

17
Q

What sort of mechanic distortion do PDL mechanoreceptors pick up?

A

Tension in PDL

18
Q

What does the tooth move around?

A

The fulcrum

19
Q

Why is there a difference in adaptation and threshold at the apical and cervical parts of PDL even though same mechnoreceptor type?

A

Linked to position relative to fulcrum of tooth

20
Q

apically (far from fulcrum) at PDL?

A

slowly adapting

21
Q

cervically (close to fulcrum) at PDL?

A

rapidly adapting

22
Q

What are the 4 stages in the sensory pathway (in order)?

A

Stage 1: Mechanoreception
Stage 2: Processing at first synapse
Stage 3: Processing in thalamus
Stage 4: Conscious perception

Occlusion (2 decks)

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