CN V

Question 1

where does VIII exit the brainstep

Answer 1

at cerebellar-pontine angle with CN VII

Question 2

what fibers are found in cochlear n

Answer 2

SSA

Question 3

cochlear ganglian contain what type of neurons

Answer 3

bipolary sensory primary neurons

Question 4

how is the cochlear ganglion unique

Answer 4

cell bodies are scattered around isntead o fclustered

Question 5

where aer second order fibers of cochlear nuclei found

Answer 5

dorsal acoustic stria and ventral acoustic stria

Question 6

course of dorsal acoustic stria

Answer 6

ascend in lateral lemniscus

terminate in inferior collili

Question 7

what are the 3 places that the entral acoustic stria terminates

Answer 7

lateral lemnisus to terminate at inferior colliculi
olivary nuclei
medial nucleus of trapezoid body

Question 8

first and second order cochlear neurons carry infromatino from what

Answer 8

ipsilateral ear

Question 9

where are third order cochlear neurons housed

Answer 9

lateral superior auditory nucleus

Question 10

how are third order cochlear neurons different from first and second order

Answer 10

they are multisynpatic and bilateral

Question 11

superior colliculi function in what sense

Answer 11

vision

Question 12

inferior colliculi function in what sense

Answer 12

hearing

Question 13

function of brachium of inferior colliculus

Answer 13

allow quick connection between hearing and vision

Question 14

sound attenuation reflex causes what

Answer 14

contractino of tensor tympani and stapedius to dampen auditory input

Question 15

pathway of first order neurons in sound attenuation reflex

Answer 15

bipolar neurons pick up signal in organ or corti

carry signal to ipilateral ventral cochlear nucleus

Question 16

pathway of second order neurons in sound attutation reflex

Answer 16

stay ipsilater or decussate

synpase bilaterally in the superior olivary nuclei

Question 17

pathway of third order neurons in sound attenuation reflex

Answer 17

terminate in trigeminal motor nucleus or facial nucles

Question 18

what happens when third order neurons reach trigemnal motor nucleus

Answer 18

axons go to tensor tympani m, cause contraction to brace the tympanic membrane

Question 19

what happens when third order enurons reac the facial nucleus

Answer 19

axons go to stapedius m, cause contraction to brace stapes

Question 20

what type of fibers does vestivular n carry

Answer 20

SSA

Question 21

where is vestidcular ganglion located

Answer 21

proximal to vestibular apparist

Question 22

proximal processes of first order vestibular neurons comes from

Answer 22

cristae of semicircular canal ampulla or hair cells

Question 23

where do central processes of first order vestibular n terminate

Answer 23

4 vesticular nucli or ipsilateral flocculonodular lobe of cerebellum

Question 24

what is unique about CN VIII

Answer 24

only CN that sends primary fibers to cerebellum

Question 25

where are vestibbular second order neurons

Answer 25

4 vestibular nuclei

Question 26

where do second order vestibular neurons send axons to

Answer 26

MLF

Question 27

where do second order vestibular neurons terminate

Answer 27

extraocular muscle nuclei, reticular formation, cervical spinal cord, cerebellum, thalamus

Question 28

where are thrid order vestibular neurons foudn

Answer 28

thalmus (sepcially VPL and VPI nuclei)

Question 29

where do third order vestibular neurons terminate

Answer 29

primary vestibular cortexx

Question 30

where do the input to the vesitbular nuclei comes from

Answer 30

vestibular n cerebellum contralateral vestibular nuclei spinal cord

Question 31

where do the output from the vestibular nuclei come from

Answer 31

extraocular muscle nuclei contralateral vestibular nuclei cerebellum brainstem reticular formation

Question 32

what are the function components of CN IX

Answer 32

``` SVE SVA GVE GVA GSA ```

Question 33

function of GVE in CN IX

Answer 33

parasympahtheitcs to parotid gland

Question 34

function of GVA in CN IX

Answer 34

visceral sensory info from nasopharygeal tube, palatine tonsiles baroreceptors from carotid sinus

Question 35

function of SVA in CN IX

Answer 35

taset from posterior 1/3 of tongue

Question 36

function of SVE in CN IX

Answer 36

skeletal motor innervatino of stylopharyngeaus muscle

Question 37

function of GSA from CN IX

Answer 37

senosry info from ear, ear canal, and posterior 1/3 of tongue

Question 38

what are the sensory ganglia of CN IX

Answer 38

superior and inferio

Question 39

superior ganglia of CN IX

Answer 39

pseudounipolar nerousn from GSA branches

Question 40

path of superior ganglia of CN IX

Answer 40

central processes descned in spinal trigeminal trac tto spintal trigeminal nucleus

Question 41

inferior ganglia of CN IX

Answer 41

pseudounipolar neurons from GVA and SVA branches

Question 42

path of inferior ganglia of CN IX

Answer 42

central processes travel in solidtary tract and terminate in solitary nucleus

Question 43

what is the parasympathteic ganglia of CN IX

Answer 43

otic

Question 44

functino of otic ganglia

Answer 44

contain postganglionic parasympahteic neurons which terminate in partoid galnd

Question 45

frey's syndrome is caused by what

Answer 45

damage to auriculotemporal n following facial surgery

Question 46

symptom of frey's syndrome

Answer 46

sweating response to food instead of salvtory response

Question 47

nucleus ambiguss contains cell bodies of waht

Answer 47

SVE

Question 48

functino of nucleus ambiggus

Answer 48

tenses styopharyngeus muscle during swallowing

Question 49

lesion of IX causes what deficits

Answer 49

``` loss of taste decrease in salivary secretion diminished visceral sensation loss of gag reflex loss of carotid sinus reflex ```

Question 50

what are the function compoents of CN X

Answer 50

``` SVE SVA GVE GVA GSA ```

Question 51

functino of SVE in CN X

Answer 51

nerve of 4th pharyngeal arch

Question 52

function of SVA in CN Xq

Answer 52

taste from epiglottis, soft palate, upper phaynx

Question 53

function of GVE in CN X

Answer 53

parasymphateics to thoracic and abdominal viscera

Question 54

function of GVA in CN X

Answer 54

chemrocepetors from carotid body

Question 55

function of GDA in CN X

Answer 55

sensory info from outer ear, external acoustic meauts, posterior 1/3 of dura

Question 56

unilateral lesion of bagus nerve root causes

Answer 56

``` flaccid paralysis or weakness dyspnea loss of gag reflex (efferent limb) loss of general sensation cardiac arrhythmia ```

Question 57

bilateral lesion of bagus nerve root causes

Answer 57

death