Neuro Somatosensory Trigeminal Spinocerebellar

Front 1

what info is carried in the trigeminal path

Back 1

ALL

fine touch, vibration, conscious proprioception (PCMLS)
pain temp, crude touch (ALS)

**from FACE ONLY

Front 2

what is in the trigeminal gang

Back 2

cell bodies of the 1 affernt neuron of nerves associated with trigeminal tract (compare to PRG)

Front 3

where are the cell bodies of 1 neurons in the trigeminal tract? where are peripheral processes

Back 3

cell bodies in trigeminnal nucleus

**peripheral processes enter one of the divisions of CN V (V1 V2 or V3)

Front 4

what structure is associated with the TYPE of sensation, trrigeminal nuclei or divisions of CN V

Back 4

the nuclei

Mesencephalic: non conscious proprioception
Spinal Trigeminal: pain and temp
Principal Sensory: discriminative touch

Front 5

what are the 3 nuclei associated with the trigeminal path and what types of sensation is each responsibel for

Back 5

1. Primary Sensory: discriminative touch (like PCMLS)
2. mesencephalic: non conscious proprioception
3. Spinotrigeminal: pain and temp

Front 6

describe the trigeminal path associated with DISCRIMINATIVE touch

1 neuron
2 neuron
3 neuron

Back 6

Primary Sensory Nucleus

1. 1 neuron has cell body in trigeminal nucleus. has Ab peripheral fibers and its central process enters the primary sensory nucleus

2. cell body in pirmary sesnory gang. decusation to form contralateral ant TGthalamic tract and synapse in VPM

3. cell body in VPM. axon enters post limb of int capsule and synapses in primary somatosensory cortex

Front 7

what is the location of the 1 neuron cell body, peripheral process ner fiber and nucleus of the discriminative trigeminal path

Back 7

cell body: trigeminal nucleus
peripheral process: Ab with some encapsulated/non encapsulated receptors
central process: traved in CN V into the primary sensory nucleus

Front 8

what is in the primary sensory nucleus

Back 8

cell bodies of 2 neurons in IPSILATERAL discriminative paths of the face

**1 neuron is in trigeminal and it synapses on primary sensory

Front 9

what info is in the primary sensory nucleus

Back 9

fine touch to IPSILATERAL side of face

**cell body of 2 neuron is here before decusation and continuation as the ant TGthalamic tract

Front 10

where in the thalamus is fine touch from face

Back 10

VPM

*from 2 neurons in the primary sensory nucleus

Front 11

where is the decusation of the fine touch for the face

Back 11

decusation occurs after 2 neuron synapses in the primary sensory nucles and travels to the anterior trigeminal tract

Front 12

what info is in the ant trigeminal tract

Back 12

CONTRALATERAL info for fine touch on the face

Front 13

how does the central process of 1 neurons carrying ipsilateral fine touch from teh face get to where it will synapse with 2 neuron. where does it go after synapse

Back 13

1 neuron has cell body in trigeminal gang
2 neuron has cell body in principal sensory nucleus

*the central process of 1 travels on CN 5 to get to cell body of 2 for synapse in the principal sensory nucleus

**after synapse the info crosses and CL info is in the ant trigeminal gang

Front 14

what is the somatotopic organization of the thalamus from lateral to medial, include the LE, Face nad UE

Back 14

lateral to medial
VPL: LE UE
VPM: Face

Front 15

what is the somatotopic organization of the postcentral gryus include the leeg, arm and face

Back 15

from superior,
leg
arm
face

Front 16

where are the 1 2 3 cell bodies in the discriminative touch of the face path

Back 16

trigeminal, principal sensory

1. trigeminal gang
2. primary sensory nucleus
3. VPM

Front 17

what level of brainstem does the discriminative touch from the face start

Back 17

pons (mid)

**not SC

Front 18

wht is the blood supply of the post central gyrus that gets info about fine touch in the face

Back 18

MCA

Front 19

where does decusation of the pain/tmep path occur? fine touch

Back 19

pain/temp: medulla (descends first)

fine touch: pons

Front 20

what does the central process of the pain/temp path of the face do once it enters CNS

Back 20

descends to medulla and tract changes name to spinal trigeminal tract, on its way to spinal trigeminal nucleus

**ipsilateral fibers

Front 21

what info is in the spinal trigeminal tract inthe medulla

Back 21

ipsilateral pain/temp from face

Front 22

what is the spinal trigeminal tract continuous with

what is the spinal trigeminal nucleus continuous with

Back 22

tract of lisseaur

substantia gelatinosa of the SC

Front 23

what nucleus is a long column of cells

Back 23

spinal trigeminal tract, continuous with substantia gelatenosa

Front 24

what is the pain/temp path in the face

Back 24

1 neuron, cell body in TG gang, enters CNS on CN V at pons and then descends as spinal TG tract into medulla (ipsilateral info)

2 neuron has cell bodies in medulla, spinal TG nucleus, synapse occurs here and axons of the 2 neuron decusate here in the medulla. the ant TGthalamic tract carrier CL pain/temp info

3 cell bodies in VPM of thalamus, synapse here and travels thorugh post limb of int capsule to enter inferior part of postcentral gryus (primary cortex)

Front 25

what BV supplies the spinal trigeminal nucleus/tract in the medulla

what about cuneate and gracilis

Back 25

PICA

PCA

**recall in medulla these are those 3 distinct nuclei

Front 26

from the trigeminal gang we have large central fibers and small. what does each do

Back 26

1. Large ascend as fine touch and enter the pirmary sesnory nucleus

2. Small are pain/temp and descend into medulla and synapse in ant spinal trigeminal

Front 27

pain/temp from the face descends from pons as what

Back 27

spinal trigeminal tract (continuous with tract of lissauer inferiorly)

**synapse in spinaltrigeminal nucleus in medulla and decusates in medulla

Front 28

what is the name of decusation for the pain/temp of face

what about pain/temp of body
what about fine touch of body

Back 28

no name, diffuse, decusate in medulla

pain/temp body: ALS, anterior commisure

Fine Touch Body: internal arcruate (PCMLS)

Front 29

what does ant trigeminothalamic tract carry?

Back 29

contralateral info from face about pain/temp and contralateral into about fine touch from face

**at medulla just pain/temp
**at pons both

Front 30

what tract conveys ALL somatosensory info from face

Back 30

ant trigeminothalamic AT THE LEVEL OF PONS

**ALL is contralateral info

**at medulla it is just pain

Front 31

where are the cell bodies...
pain/temp of face

what about fine touch

Back 31

1. trigeminal gang
2. spinal trigeminal nucleus (medulla)
3. VPM

touch
1. TG gang
2. principal sensory (pons)
3. VPM

Front 32

where does pain/temp info from the face end up in the cortex

Back 32

most inf part of postcentral gyrus

**primarysomatosensory cortex.
**MCA BV

Front 33

what bv supplies the pain/temp and fine touch of the face in the cortex

Back 33

BOTH are MCA, inferior part of post central gyrus

Front 34

so most of the 1 cell bodies are in the PRG or the TG gang, what is an exception

Back 34

Non Conscious proprioception of face is in mesencephalic nucleus

**1 neuron path to cerebellum

Front 35

what is the only place in CNS with pseudounipolar nerves

Back 35

pseudounipolar are neural crest derives, but the one in the mesencephalic nucleus made it into CNS

Front 36

what are the peripheral process of the 1 neuron that has its cell bodies in the mesencephalic nucleus

Back 36

peripheral process are mm spindles and GTO for proprioception

Central Process enters CNS on CN 5

Front 37

what path is associated with affernt limb of jaw jerk reflex

Back 37

Non Conscious Proprioception from face

mesencephalic nucleus to trigeminal motor nucleus

Front 38

cell bodies for what sensation are in the TG gang

Back 38

pain/temp and fine touch, non conscious proprioception is in mesencephalic

**all are for face

Front 39

how does hte central process of the mesencephalic nerve enter the cerebellum.

Back 39

ascends in the Sup Cerebellar Pedunce to get to cerebellum for non conscious proprioception

Front 40

in general where are hte 1 cell bodies for spinocerebellar paths, where are peripheral processes, what about central

Back 40

cell body: PRG
Peripheral: GTO, mm spindle, joint receptor

Central: synapse in SC or brainstem

Front 41

in general where are 2 cell bodies in the spinocerebellar paths, how do they enter cerebellum

Back 41

cell bod: SC or brainstem

Enter: restiform (some do superior cerebellar peduncle like we saw with the TG non conscious proprioception, 1 neuron path)

Front 42

what was hte 1 neuron path we learnd

Back 42

non conscious proprioception of the face to the cerebellum

**mesencephalic nucleus to SCP

Front 43

with non conscious proprioception in spinocerebellar paths does info cross to CL side

Back 43

NPE!

Front 44

what are the 2 spinocerebellar paths that convey proprioception from LE, UE

Back 44

LE: post and ant spinocerebellar

UE: cuneocerebellar, rostral cerebellar

Front 45

what path doesnt have info that crosses to CL side

Back 45

non conscious proprioception in spinocerebellar paths

Front 46

the post spinocerebellar carires ____ info from _____

where are cell bodies of 1 2 neurons

Back 46

non conscious, LE

1, PRG; 2, clarkes nucleus

**from PRG to fasciculis gracilis to ascend and enter clarkes nucleus in upper thoracic

Front 47

clarks nucleus has what

Back 47

1. cell bodies of 2 nerve of non conscious proprioception in LE

found in upper thoracic, LE enters SC at L2-S4. info ascends

Front 48

where does non conscious proprioception of the LE enter the SC, where does this info need to synapse, how does it get there. what happens then, how does it get to cerebellum

Back 48

L4-S2

Clarkes nucleus in upper thoracic

Ascends in the gracilis fasciculus. BOTH conscious and non conscious info is here now :)

Synapse in Clarkes Nucleus, and then travel in post spinocerebellar tract. it then enters cerebellum via Restiform body

**Ipsilateral

Front 49

the post spinocerebellar is the path for LE non conscious proprioception, what is the cuneocerebellar tract

Back 49

analogous path. non conscious proprioception for UE

*

Front 50

non conscious proprio from UE enters SC at --- and synapses ____. what must happen.

what happens after synapse in accessory cuneate nucleus

Back 50

C5-T1
accesseory cunneate nucleus in the caudal medulla (NOT SC)

must ascend via fascululus cunneatus.


*2 axons ascend as cuneocerebellar tract and enter cerebellum via restifrom

Front 51

what info is in lateral/accessory cuneat nucleus

Back 51

non conscious proprioception from UE

(cuneate nucleus has conscious proprioception from UE)

**cuneocerebellar tract

Front 52

what is the only spinocerebellar track that doesnt use the restiform to enter the cerebellum

Back 52

anterior spinocerebellar doent, it uses SCP

**post spinocerebellar, cunneatecerebellar and rostral spinalcerebellar all use restiform

Front 53

for both the post spinocerebellar and cuneocerebellar what is the general idea of the 1 neurom

Back 53

1. peripheral receptors are proprioceptiors: GTO, mm spindle, joint receptors

2. the central process then enters at C5 to T1 or L4-S2. but they must ascend to get to their nuclei

3. Ascend in fascuculis cuneate/gracilis as appropriate

4. LE synapses in clarkes nucles. UE synapses in accessory cuneate nucleus

5. after synapse both nerve fibers are sent to cerebellum via restifrom body

Front 54

how is conscious and non conscious info processed initially

Back 54

same! then it breaks, non conscious goes to clarke or accessory nucleus. but both travel happily togehter in the cunneate nad gracile nucleus

Front 55

how do anterior and rostral spinocerebellar relate to posterior and cunneate spinocerebellar trackt

Back 55

anteior rostral: proprioception from ENTIRE limb

postior/cunneate: proprioception from a specific joint

Front 56

tell me about the ant spinocerebellar tract
UE or LE
input from what level
what cell
ipsilateral? decusation?
entrance into cerebellum?

Back 56

LE
L3-L5
Spinal Border cells
yep, with 2 decusatoins. spinal border cells send axons across the SC through the anteiror commisure and into the ant spincerebellar tract, ascend to pons and then enter cerebellum via SCP and it crosses again here

Front 57

what spinocerebellar path is double crossed ipsilateral path

Back 57

ant spinocerebellar. crosses at ant commisure and at SCP

**onyl one that really uses SCP (rostral kinds does)

**spinal dural cells at L3-:L5 enter and carry non conscious proprio from ENTIRE LIMB. cross at ant commisure and enter ant spinalcerebellar tract. ascend to pons and cross again in the SCP before entering the pons

**spinal dural cells

Front 58

the anteior spinocerebellar tract carries what info, is this different from all of the other spinocerebellar pathy

Back 58

it carries contralateral non conscious proprioception (it crisses at SCP b4 it enters cerebellum)

**the other spinocerebellar paths have ipsilateral non consciuous proprioception

Front 59

tell me abotu the rostral spinocerebellar path
UE or LE
level
cell bodies?
Ipsilater?
entrance into cerebellum

Back 59

UE, entire limb (cunneatus is non consiouc from specific joint in UE)

C4-C8

Lamina VII

ipsilateral

restiform body or SCP

Front 60

what levels is cunneatecerebellar? rostral/

what about post/ant spinocerebellar

Back 60

cunneate C5-T1,
Rostral: C4-C8

Post: T1-L2
Ant: L3-L5

Front 61

what is in lamina 7 cell at C4-C8.

Back 61

cell bodies of non conscious prpprioception of the UE from rostral spinocerebellar tract

Front 62

can you id the rostral spinocerebellar

Back 62

not really in the lateral funniculus

Front 63

clarks nucleus carries waht cell bodies, what level? where do these axons go

Back 63

2 order neurons from post SPCB path
thoracic
axons from post SPCB

Front 64

are there any spinocerebellar tracts in the lumbar SC

Back 64

there are non conscious proprioception fibers from the leg being carried in the fasciculus gracilis until it reachs thoracic where they leave and enter clarks nucleus, synapse nad then those axons of the 2 neuron form post spinocereb

Front 65

can we ID rostral spinocerebellar in myelin

Back 65

not reall, just know that in cervical cord the cell bodies are in lamina 7

(c4-C8)

Front 66

where are the 1 neurons for cunneocerebellar trach, 2?

Back 66

1 are in arm (specific joint) and those axons travel in cunneate fasciculus until it reaches the ACCESSORY cunneate nucleus where it synapses with 2 neurons. 2 neurons then travel to cerebellum in restiform body