Lec 7 - Pain Pathways

Question 1

small myelinated free nerve endings

Answer 1

a delta fibers

Question 2

small nonmyelinated nerve endings

Answer 2

c fibers

Question 3

delta fibers are more blank than c fibers

Answer 3

localized pain

Question 4

local anesthetics block these first

Answer 4

nonmyelinated fibers

Question 5

partial nerve transection/damage causes severe burning pain called blank

Answer 5

causalgia

Question 6

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

Answer 6

lateral

Question 7

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

Answer 7

lisauer tract

Question 8

pain pathway

Answer 8

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

Question 9

interneurons allow for the blank of pain

Answer 9

modulation

Question 10

pain and temperature neurons cross over blank

Answer 10

almost immediately

Question 11

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

Answer 11

posterolateral, anterior

Question 12

three subdivisions of anterolateral pathway

Answer 12

spinothalamic tract, spinoretricular tract, spinomesencephalic tract

Question 13

spinothalamic tract is very preciselyblank

Answer 13

localized

Question 14

spino thalamic tract deals more with blank fibers

Answer 14

delta

Question 15

spinoreticular tract deals with blank fibers

Answer 15

c

Question 16

spinoreticular tract lacks blank arrangement

Answer 16

somatotopic

Question 17

tract of anterolateral pathway that has a role in pain control

Answer 17

spinomesencephalic

Question 18

spinomesencephalic tract only makes it up to reach this structure

Answer 18

periaqueductal gray of midbrain

Question 19

spinothalamic tract is directly lateral to blank

Answer 19

medial lemniscus

Question 20

spinoreticular tract is directly medial to blank

Answer 20

reticular formation

Question 21

3 functions of reticular formation

Answer 21

arousal by sensory info, consciousness, modulation of pain

Question 22

NT made by raphe nuclei

Answer 22

serotonin

Question 23

serotonin blank pain via spinothalamic neurons

Answer 23

suppresses

Question 24

depressed people feel more blank because of less blank

Answer 24

pain, serotonin