Lecture 3: Central Pathways

Front 1

all somatosensory pathways relay through a _______ nucleus

Back 1

thalamic

Front 2

all somatosensory pathways terminate in the ____________

Back 2

parietal lobe of the cerebral cortex

Front 3

in general, the spinothalamic pathway senses ______

Back 3

crude touch, pain, temp from the body

Front 4

the neospinothalamic pathway senses _________

Back 4

crude touch, fast pain

Front 5

the archispinothalamic pathways senses _________

Back 5

diffuse burning

Front 6

the paleospinothalamic pathway senses _________

Back 6

diffuse aching

Front 7

in the VPL, the lower body is ______ and the upper body is ______

Back 7

lateral, medial

Front 8

spinal cord lesion has ____lateral affect on spinothalamic tract?

Back 8

contralateral (cross right away!)

Front 9

cranial homologue of the spinothalamic pathway?

Back 9

spinal trigeminal pathway

Front 10

what does the spinal trigeminal pathway sense?

Back 10

crude touch, pain, temp from the face

Front 11

spinal trigeminal tract descends from ____ to _____ in the spinal cord

Back 11

mid pontine level down to C1

Front 12

decussated spinal trigeminal afferent axons form what?

Back 12

ventral trigeminal lemniscus

Front 13

the doral column (medial lemniscus) pathway senses what?

Back 13

discriminative touch and proprioception from the body

Front 14

posterior roots below __ ascend in the _______ gracile fasciculus

Back 14

T6, ipsilateral

Front 15

posterior roots above ___ ascend in the ipsilateral ___________

Back 15

T6, cuneate fasciculus

Front 16

cranial homologue of the medial lemniscus pathway?

Back 16

main sensory trigeminal pathway

Front 17

main sensory trigeminal axons from the VPM terminate in the _____ of the postcentral gyrus

Back 17

lower half

Front 18

spinal cord lesion has _____lateral affect on dorsal column pathway

Back 18

ipsilateral (haven't crossed yet!)

Front 19

modality convergence occurs where?

Back 19

cortex

Front 20

the area of skin that when stimulated produces a response in a given somatosensory neuron...

Back 20

receptive field

Front 21

the ______ the receptive field, the greater accuracy in locating the point of stimulus contact or movement

Back 21

smaller

Front 22

in the medial lemniscus, the upper body is medial/lateral and the lower body is medial/lateral

Back 22

medial, lateral

Front 23

which pathway decussates via the internal arcuate fibers?

Back 23

dorsal column