Lec 7 - Pain Pathways Flashcards

1
Q

small myelinated free nerve endings

A

a delta fibers

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2
Q

small nonmyelinated nerve endings

A

c fibers

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3
Q

delta fibers are more blank than c fibers

A

localized pain

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4
Q

local anesthetics block these first

A

nonmyelinated fibers

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5
Q

partial nerve transection/damage causes severe burning pain called blank

A

causalgia

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6
Q

pain and temperature sensation are transmitted via the blank division of the spinal cord

A

lateral

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7
Q

where the pain and temperature sensation enter the lateral division of the spinal cord via the posterior horn

A

lisauer tract

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8
Q

pain pathway

A

neurons of lamina 1, dendrites in substantia gelatinosa, small interneurons of s. gelatinosa

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9
Q

interneurons allow for the blank of pain

A

modulation

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10
Q

pain and temperature neurons cross over blank

A

almost immediately

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11
Q

somatotopic organization of spinal cord has lower body neurons located blank but upper body neurons located blank

A

posterolateral, anterior

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12
Q

three subdivisions of anterolateral pathway

A

spinothalamic tract, spinoretricular tract, spinomesencephalic tract

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13
Q

spinothalamic tract is very preciselyblank

A

localized

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14
Q

spino thalamic tract deals more with blank fibers

A

delta

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15
Q

spinoreticular tract deals with blank fibers

A

c

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16
Q

spinoreticular tract lacks blank arrangement

A

somatotopic

17
Q

tract of anterolateral pathway that has a role in pain control

A

spinomesencephalic

18
Q

spinomesencephalic tract only makes it up to reach this structure

A

periaqueductal gray of midbrain

19
Q

spinothalamic tract is directly lateral to blank

A

medial lemniscus

20
Q

spinoreticular tract is directly medial to blank

A

reticular formation

21
Q

3 functions of reticular formation

A

arousal by sensory info, consciousness, modulation of pain

22
Q

NT made by raphe nuclei

A

serotonin

23
Q

serotonin blank pain via spinothalamic neurons

A

suppresses

24
Q

depressed people feel more blank because of less blank

A

pain, serotonin