Ascending pathways flashcards
other name for lateral spinothalamic tract?
neospinothalamic tract
What does lateral spinothalamic/neospinothalamic tract do?
epicritic pain and temp
(nociceptors, thermoceptors)
What type of fibers associated wtih lateral spinothalamic/neospinothalamic tract?
A delta fibers
Where does lateral spinothalamic tract / neospinothalamic tract end?
post central gyrus
2nd name for anterior spinothalamic tract?
paleospinothalamic tract
what does ant. spinothalamic tract / paleospinothalamic tract do?
crude touch (pressure receptorts) and protopathic pain (nociceptors)
What types of fibers associated with ant. spinothalamic tract/paleospinothalamic tract?
C fibers
What makes ant. spinothalmaic tract different from lateral spino thalamic tract?
Most fibers decussate in ant. white commisure
fibers from ant. spinothalamic tract: some go to reticular formation (spinoreticular fibers) and then diffuse thalamic nuclei where as some fibers go to periaquaductal gray (spinotectal fibers)
Which pathways pass through the VPL?
lateral spinothalamic tract
ant spinothalamic tract
arachispinothalamic tract
dorsal white column pathway
Where does ant. spinothalamic tract end?
post central gyrus
gyrus cynguli
insular lobe
Pathways that pass through VPM?
Trigeminothalamic tract
Function of trigeminothalamic tract?
epicritic pain and temp of the face
What kinds of fibers are associated with trigeminothalamic tract?
A delta and C fibers
Where does trigeminothalamic tract end?
post central gyrus
2nd name for arachispinothalamic tract?
propriospinal tract
what does arachispinothalamic tract / propriospinal tract do?
protopathic pain and crude touch
Same as ant. spinothalamic tract
What makes arachispinothalamic tract different from lateral and anterior spinthalamic tracts?
some fibers cross and some don’t in propriospinal tract
Then it goes to VPL, but also to reticular formation, periaqeuductal gray, hypothalamus
Where does arachispinothalamic tract end?
post central gyrus
Where does arachispinothalamic tract deucussate?
propriospinal tract
Does trigeminothalamic tract deucssate?
no
where to lateral and anterior spinothalamic tracts decussate?
ant. white commissure
What kinds of fibers associated with dorsal white column pathway?
A beta fibers
Where is fassiculus cuneatus?
T4-T8
where does dorsal white column pathway ducussate?
internal arccuate fibers
What receptors start both post and ant spinocerebellar tracts?
peripheral tactile and proprioceptive fibers
what kind of fibers are associated with both ant and post cerebellar pathways and dorsal white column pathway?
A beta fibers
Does post spinocerebellar tract cross?
no
does ant spinocerebellar tract cross?
yes, twice in ant spinocerebellar tract and in sup cerebellar peduncle
what cerebellar peduncle does post spinocerebellar pathway pass through?
inf cerebellar peduncle
what cerebellar peduncle does ant spinocerebellar pathway pass through?
sup cerebellar peduncle
where does both spinocerebellar pathways end?
cerebellar cortex
Where does cerebello thalamic cortico pathway cross?
sup cerebellar peducnle
where does cortico-ponto cerebellar pathway cross?
pontine nuclei
which two pathways are basically inverse of eachother?
cerebellothalamiccortico pathway and
cortiocopontocerebellar pathway
