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Neuro > 16: Sensory CN's > Flashcards

16: Sensory CN's Flashcards

1
Q

name the sensory cranial nerves

A

I, II, V, VII, VIII, IX, X

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2
Q

neural tube gives rise to

A

CNS

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3
Q

neural crest will give rise to

A

all neurons whose cell bodies are located outside the CNS in the PNS-of nerves gangla and pexuses

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4
Q

derivatives of the neural tube include

A

neurons in the CSN
suporting cells of the cns
somatomotor neurons of the PNS
presynaptive autonomic neurons of the PNS

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5
Q

derivatives of the neural crest include

A 
sensory neurons in the PNS
postsynaptice autonomic fibers
schwann neurolemma cells
adrenal medulla
head mesnchyme
melanocytes
arachnoid and pia mater
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6
Q

sensory nuclei in the neural tube are restricted to

A

dorsal to the sulcus limitans

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7
Q

motor nuclei in the alar plate are restricted to

A

ventral to the sulcus limitans

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8
Q

in the floor of the rhomboid fourth ventricle….sulcus limitans is

A

outer margin

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9
Q

name the three sensory nuclei of CN V

A

Chief sensory
Spinal
Mesencephalic

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10
Q

chief sensory located in the

A

pons-discreet sensory nucleus

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11
Q

mesencephalic nucleus located in the

A

mesencephalon-discrete sensory nucleus

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12
Q

spinal nucleus extends as a column from the _____ to the ______ where it_____

A

mesencephalon

to the spinal cord

where it is continuour with the substantia gelatinosa layers I and II

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13
Q

cranial nerves projecting to spinal nucleus of CN V that is continuour with substantia gelatinosa

A

V, VII, IX, X

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14
Q

VIII nuclei in the pons

A

vestibular (body positionaing) and chochlear (hearing)

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15
Q

rostral solitary nucleus concerned with

A

taste->

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16
Q

CN’s carrying taste info to solitary nucleus

A

CN VII. IX, X

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17
Q

caudal solitary nucleus concerned with

A

cardiorespiratory inputs

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18
Q

taste to anterior 2/3 of the tongue

A

nervous intermedius- CN VII

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19
Q

taste from posterior 1/3 of tongue

A

CN IX

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20
Q

trace path of smell into cortex

A

nasal epithelia sensory receptors-thin axons arise thru CRIBRIFORM plate–> synapse in bulb–> axons thru olfactory tract-synapse in 1. olf cortex, amygdala, other forebrain parts

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21
Q

lack of smell

A

anosmia

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22
Q

receptors for CN II located

A

in the retina at the posterior of the eye

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23
Q

optice nerve made up of….

A

axons of retinal ganglion cells

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24
Q

trace visual stimulus to cortex

A

ligh-retina-optic nerve-chiasm-tracts-Lateral geniculate Nucleus in mesencephalon (visual thalamus)–> projectes to primary visual cortex

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25
Q

primary visual cortex found …

A

on the banks of the calcarine fissure

26
Q

some optice fibers bypass LGN and travel in the

A

brachium (arm) of superior colliculus-synapse on superior colliculus (tectum of mesencephalon)

27
Q

tectum of mesencephalon=

A

superior colliculus

28
Q

sensory branches ot CN V-accomplished somestheses for the face

A

v1-opthalmic
V2- maxillary
V3-mandibular

29
Q

CN V nucleus-located in rostral pons-epiciritic afferents for fine touch and vibration from face

A

chief sensory

30
Q

analogous to the posterior column nuclei for face

A

chief nucleus of V

31
Q

epicritic afferents in V have their cell bodies in_____ which is located ______
*analogous to DRG of spinal cord

A

treigeminal ganglion
aka

gasserian ganglion

located OUTSIDE THE brain stem

32
Q

cell bodies of proprioceptice afferents (spindle organs, golgi tendons organs) from masticatory muscles and extraoccular muscles

A

mesencephalic nucleus

the peripheral proceses of which constitute the mescephalic tract of V

33
Q

comparable to the myotatic reflec in limbs

A

mesencephalic tracts

34
Q

pain and temp fropm face in CN V distribution

A

spinal nucleus of V

35
Q

extends from mesencephalon-to substantia gelatinosa

A

Spinal tract of V

also pain and temp from VII, IX, X

36
Q

sensory tracts with Cell Bodies in Trigeminal Ganglion

A

SPinal and Cheif

37
Q

Cell bodies outside the Trigeminal ganglion

A

mesencphallic

38
Q

from chief sensory nucleus of V….

A

trigeminal lemnisucus takes fibers to contralateral side–> to the Ventral Posteromedial nucleis of the thalamus
*analogous to medial lemnisiscus pathway

39
Q

trigeminothalamic tract runs from

A

spinal nucleus of V to the VPM-analogous to spinothalamic tract

40
Q

list the orientation of sensory fibers in the nucleus or travelling in the tract

A

anterior/ventral to dorsal/posteriorV1, V2, V3,

then 7. 9 , 10 are most dorsal

41
Q

proprioceptive afferents from muscles of mastication, tongue and EOM’s project bylaterally to

A

TrMNu

to mediate monosynaptic stretch reflexes

42
Q

CN VII has two sensory components

A

> SVA fro anterior 2/3 of tongue

>GSA (somesthetic) around external Auditory Meatus (fine touch vibration and pain/temp)

43
Q

cell bodies for somesthetic afferents of 7 located in

A

geniculate ganglion

44
Q

central processes from geniculate gangl;ion of 7 project to

A

chief sensory nucleus– trigminal lemniscus–> VMP to thalamus–> cortex

or

spinal nucleus of V for pain and temperature

45
Q

taste fibers of 7 project to

A

rostral nucleus tractus solitarius

(gustatory nucleus)–. then to VPM–>then to cortex

46
Q

gustatory nucleus recieves info from CN’s

A

7, 9, 10

47
Q

CN VII nuclei (2)

A

vestibular

cochlear

48
Q

vestibular concerned with

A

balance and acceleration

49
Q

cochlear nucleus concerned with

A

auditory cues and hearing

50
Q

auditory receptors, also known as ______ are located in _____

  • transduce airborne pressure into waves carried in 8
  • tonotropic organization-lacation determines the frequency they can hear
A

hair cells

in the cochlea=organ of corti

51
Q

vestibular receptors are also called ______ and are located in____

A

hair cells

saccule, utricle and three semicircular canals

52
Q

cell bodies of auditory CN VIII lie in____ and send axons in CN VIII to synapse on dorsal and ventral____

A

spiral ganglion

cochlear nuclei via cochlear division of vestibulocochlear nerve

53
Q

from ventral and dorsal cochlear nuclei…describe the assenction of sound info

A

synapse in D and V cochlear ganglion at pontomedullary junction-ascend BILATERALLY to inferior colliculus–> projects to medial geniculate body (auditory thalamus–> Med Gen-to auditory cortex-heschel’s gyrus.

54
Q

vestibular branch of VIII–> vestibular hair cells synapse on

A

vestibular ganglion (scarpa’s ganglion) in pons/rostral medulla–> send axons in vestibular division of CN VIII

55
Q

functions of CN IX

A

> taste from posterior 1/3 of tongue
somatic sensation from pharynx
chemo and baroreception from carotid sinus and carotid bodies
fine touch, pain, temperature from middle ear and part of external ear

56
Q

CN IX baroreceptors

A

from carotid sinus

57
Q

chemoreceptors CN IX

A

from carotid body

58
Q

pain and epicritic from IX ends up with

A

spinal trigem

cheif of v

59
Q

chemo (body) and baro (sinus) travel with 9 to

A

caudal NTS

60
Q

afferents for general visceral sense of pharynx and larynx project to

A

caudal NTS

*unique

61
Q

gag reflex

A

afferents via 9 to caudal NTS–> interneuron to Nucleus ambiguus–> efferent is vagus motoneurons to rais palate

Neuro (19 decks)

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