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Surgery > Physiology > Flashcards

Physiology Flashcards

1
Q

Pain carry fibers

A

A delta & c fibers

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2
Q

Touch & pressure carrying fibers

A

A - beta fibers

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3
Q

2 point discrimination is short at

A

Lips, finger tips

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4
Q

Types of touch fibers

A

4 types - 2 superficial ( meissner’s corpuscles & merkel cells)

2 Deep - pacinian corpuscles & Ruffini’s ending

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5
Q

Meisnner’s corpuscles function

A

Fine touch and vibration

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6
Q

Which touch receptor helpful in Brallie reading system

A

Merkel cells

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7
Q

Which touch receptor detects pressure changes & vibration

A

Pacinian corpuscles

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8
Q

Detects pressure changed in joint spaces and skin stretch!?

A

Ruffini’s ending

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9
Q

Congenital insensitivity to pain syndrome is d/t!?

A

Voltage gated sodium channels are absent at FNE

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10
Q

Hyperalgesia !?

A

Increase sensitivity to pain dt to various chemical ( algogens)

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11
Q

Most powerful pain producing chemical !?

A

Bradykinin

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12
Q

Most potent analgesia !?

A

Morphine

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13
Q

Endogenous morphine produced by peri aqueductal Gray matter !?

A

Endorphins , dynorphin enkephalin

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14
Q

Stress induced analgesia!?

A

Anandamide

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15
Q

Gate theory of pain based on !?

A

Transcutaneous electrical nerve stimulation of A beta fiber’s

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16
Q

Cold detecting receptors acts through ……

A

A delta & c fibers via TRPM ( transient receptor potential menthol channels)

17
Q

Warm detecting receptor acts through….

A

C fibers via TRPV channel

18
Q

Rapidly adapting receptors/phasic receptors !?

A

Meissner corpuscles & pacinian corpuscles

19
Q

Slowly adapting receptors / tonic receptors ??

A

Merkel & Ruffini endings , FNEs

20
Q

Neospinothalamic tract

A

A delta

21
Q

Paleospinothalamic tract!?

A

Type c fibers

Surgery (8 decks)

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