Sensory II

Question 1

ALS relays what sensations from teh body

Answer 1

nociceptive*
thermal*
non-discriminative touch
pressure and propriocention

Question 2

ALS contains what ascending tracts

Answer 2

anterior spinothalamic

lateral spinothalamic tract

Question 3

where is antertior spinothalamic tract lcoated

Answer 3

inanterior funciculus or anterior aspect of spinal cord

Question 4

what does anterior spinothalamic tract look like

Answer 4

delicate, thin

Question 5

where is lateral spinothalamic tract located

Answer 5

ventrolateral/anteriolateral aspect of lateral funiculus

Question 6

what does lateral spinothalamic tract look like

Answer 6

more prominent

main tract

Question 7

what are the minor tracts of the ALS

Answer 7

spinorecitcular
spinomesncephalic
spinotectal
spinohypothalamic

Question 8

whre is spinomesencephalic tract located

Answer 8

ascends from teh spinal cord up to periaquaductual gray matter

Question 9

where is spinotectal tract located

Answer 9

ascends to superior colliuclus

Question 10

path of spinothalamic tract

Answer 10

spinal cord to thalamus to sensory cortex

Question 11

neospinothalmic system

Answer 11

direct pathways, brings sensory info directly to VPL nucleus of thalamus

Question 12

paleospinothalamic system consistsna mainly of what

Answer 12

spinoreticular tract

Question 13

path of paleospinothalamic system

Answer 13

spinal cord to RF to thalamus to hypothalamus, limbic cortex

Question 14

does most of information carried by paleospinothalamic system enter consciousnes?

Answer 14

no

Question 15

function of neospinothalamic system

Answer 15

brings fast, sharp, well colazied pain sensation to consciousness

Question 16

what type of pathways is neospinothalmic

Answer 16

3 neuron

Question 17

where is neuron I cell body

Answer 17

DRG

Question 18

where is neuron II cell body

Answer 18

dorsal horn

Question 19

where is neuron III cell body

Answer 19

VPL of thalamus

Question 20

nucleus proprius contains what

Answer 20

cell bodies of neurons whose axons cross in the ventral white commissure and then form teh spinothalamic tracts

Question 21

where do peripheral process terminate

Answer 21

as free nerve ending in skeletal muscle, skin, ten, ligam, joint capsule, periosteum, bone or visceral structure

Question 22

alphadelta fiber

Answer 22

lightly myelinated, has a small diameter

Question 23

how do central process of neuron enter spinal cord

Answer 23

via dorsal root of spinal neur

Question 24

what happens when central process enters white matter

Answer 24

bifurcates into short ascending and short descending branch in the dorsolateral tract of lissaur

Question 25

dorsolateral tract of lissauer

Answer 25

does not have long ascending or desending axons,

Question 26

where do ascending and descending branches synpase

Answer 26

substantia gelatinosa

Question 27

function of substantia gelatinosa

Answer 27

modulation of nociception

Question 28

nucelus proprius consists of neurons housed wehre

Answer 28

in rexed laminae IV, V

Question 29

what does spinothalmic tract arise from

Answer 29

nucleus proprius

Question 30

in the pain pathways teh cell bodies of second order neurons are located where

Answer 30

dorsal horn of all levels of spinal cord

Question 31

reticular formation

Answer 31

inovled in reflexes, awakening, alertness, motor activity

Question 32

what happens with 3rd order neurons as they ascend

Answer 32

go through corona radiata and internal capsule and terminate in primary somatosensory cortex

Question 33

what happens to 2nd order neurons on their way to the thalamus

Answer 33

give off collateral branches that terminate in reticular formation

Question 34

function of medial aspect of primary somatosensory cortex

Answer 34

process sensory info from lower limb