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jason's neuro block > Peripheral sensory mechanisms > Flashcards

Peripheral sensory mechanisms Flashcards

1
Q

what is glabrous skin? where is it found?

A

hairless: hands and feet with skin ridges

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2
Q

which corpuscles are close to surface?

A

Meissner corpuscles

Merkel complex

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3
Q

which corpuscles are deeper?

A

pascinian

Ruffini

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4
Q

Mechanoreceptors are?

A

the 4 corpuscles help to experience touch

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5
Q

how does transduction in a mechanosensory afferent work?

A

the ion channels are opened if threshold is reached via mechanical force eg. pascinian corpuscles and vibration

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6
Q

difference between slowly and rapidly adapting mechanoreceptors?

A

rapid: get used to stim easily and stops firing
slow: keeps firing, you’re aware after continued stim

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7
Q

tactile vs. nociceptive thresholds?

A

tactile: low threshold
nociceptor: high threshold/wide range

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8
Q

Which corpuscles have large vs. small receptor fields

A

large: pascinian, ruffini
small: meissner, merkel

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9
Q

Which corpuscles are slowly adapting?

A

merkel

ruffini

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10
Q

Which corpuscles are rapid adapting?

A

meissner

pascinian

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11
Q

Ruffini detect what?

A

proprioceptive

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12
Q

Pascinian detect?

A

vibrations

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13
Q

Merkel

A

indentation

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14
Q

Meisner detect?

A

light touch

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15
Q

which corpuscles has smallest receptor fields?

A

merkel

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16
Q

gripping an object: what do each of the 4 mechanoreceptors do?

A

Meissner encode rate of force
Merkel encodes grip
pacinian: vibration
Ruffini: hand posture

17
Q

two point discrimination tests?

A

closeness of receptor fields

18
Q

which nerves are smallest? slowest? why?

A

nociceptor: free nerve endings, slow, so you can pack lots of them in densely

19
Q

mechanoreceptors for touch are large or small? have myelin?

A

large myelinated

20
Q

what innervated face dermatome?

A

trigeminal

21
Q

dermatomes only in one band of skin?

A

lots of overlap

can spread to one dermatome on either side

22
Q

how to tell dermatome vs. peripheral nerve?

A

dermatome affects the entire length usually because the problem is proximal

23
Q

3 zones of trigeminal?

A

opthalmic
maxillary
mandibular

jason's neuro block (54 decks)

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