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Module 4 - mastication and Occlusion > Mechanoreception > Flashcards

Mechanoreception Flashcards

1
Q

what is mechanoreception?

A

detection of mechanical stimuli

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2
Q

how would you describe a mechanoreceptor?

A

peripheral receptor

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3
Q

what type of stimuli lead to mechanical distortion?

A

pressure
vibration
tension

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4
Q

what describes giving information about things meeting the body from outside?

A

exteroreception

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5
Q

what describes awareness of position?

A

proprioception

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6
Q

what are the orofacial mechanoreceptors?

A

mucosa
PDL
muscles
joint receptors

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7
Q

what does stimulation of mechanoreceptors lead to?

A

sensation of touch
reflexes
interact/ modulate other sensory modalities

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8
Q

how are mechanoreceptors classed?

A

adaptation properties
receptive field size
anatomical classification

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9
Q

what type of mechanoreceptors only give information when state is changing?

A

rapidly adapting

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10
Q

give examples of rapidly adapting mechanoreceptors

A

Meissner’s corpuscle
Pacinian corpuscle

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11
Q

what type of mechanoreceptors carries on firing throughout change?

A

slow adapting mechanoreceptors

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12
Q

give examples of slow adapting mechnoreceptors

A

merkel cells
ruffini endings

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13
Q

what is the receptive field?

A

area/ space where a stimulus will affect the receptor

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14
Q

what nerve endings to PDL mechanoreceptors have?

A

ruffini

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15
Q

what afferents are PDL mechanoreceptors?

A

a-beta axons

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16
Q

where do the cell bodies of PDL mechanoreceptors travel?

A

trigeminal ganglion and mesencephalic nucleus

17
Q

how is it easy to localise PDLs?

A

no branched axons between adjacent teeth

18
Q

where is PDL mechanoreceptor density at its greatest?

A

apex of tooth

19
Q

what does the amount of PDLM activity depend on?

A
  • Direction of applied force
  • Magnitude of force
  • Adaptation properties
  • Threshold of the receptors
  • Position of receptors in PDL
20
Q

what are the stages of the sensory pathway?

A

mechanoreception
processing at first synapse
processing in thalamus
conscious perception

21
Q

what occurs in stage 1 (mechanoreception) of the sensory pathway?

A
  • Transduction (detection) of stimulus
  • Propagation along primary afferent nerve.
22
Q

where is the first synapse of the sensory pathway?

A

trigeminal nucleus

23
Q

where does conscious perception occur?

A

somatosensory cortex

24
Q

where do sensory PDLMs synapse?

A

main sensory nucleus

25
Q

where do sensory PDLMs project to?

A

spinal trigeminal nuclei
then
sensory cortex via thalamus

Module 4 - mastication and Occlusion (8 decks)

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