CN IV

Question 1

what are the 5 functional compoents of the facial nerve

Answer 1

SVE, SVA, GVE, GSA, Gva

Question 2

sve AFFECTS

Answer 2

MUSCLES OF FACIAL EXPRESSION

Question 3

sva AFFECTS

Answer 3

TASTe to anterior 2/3 of tongue

Question 4

GVE affects

Answer 4

parasymph innervation to lacrimal, saliary, nasal, palatine glands

Question 5

GSA affects

Answer 5

skin of back of ear, auricle, external auditory meauts

Question 6

GVA affects

Answer 6

nasal cavity, soft palate, surrounding pharyngeal wall

Question 7

what are the 2 roots of CN VII

Answer 7

facial nerve proper

nervus intermedius

Question 8

what innervation does facial nerve proper provide

Answer 8

motor

Question 9

what innervation does nervus intermedius provide

Answer 9

sensory and parasympathetic

Question 10

what is the sensory ganglion of CN VII

Answer 10

geniculate ganglion

Question 11

what are teh 2 parasympahteic ganglia of CN VII

Answer 11

pterygopalatine

submandibular

Question 12

function of pterygopalatine ganglia

Answer 12

hay fever ganglion

innervate alcrimal and nasal glands

Question 13

function of submandibular gland

Answer 13

innervates submandibula rand sublingual glands

Question 14

what are the 2 nuclei of the facial n

Answer 14

facial nucleus

superior salivatory nuclues

Question 15

what type o fnucleus is the facial nucleus

Answer 15

motor

Question 16

what type of nucleus is the rsuperior salivatory nucleus

Answer 16

parasympatheric

Question 17

how is taste projected

Answer 17

via solitary tract to solitary nucleus

Question 18

upper half of facial nucleus receives what

Answer 18

bilateral corticonuclear projections

Question 19

lower half of the facial nucleus recieves what

Answer 19

only contralateral corticonuclear projections

Question 20

facial nerve forms _____ limb of corneal blink reflex arc

Answer 20

efferent (motor)

Question 21

how does CN VII exit the brainstem

Answer 21

through internal acoustic meatus with vestibulouscochlear n

Question 22

the geniculate ganglion contains what

Answer 22

cell bodies o fpseudounipolar neurons

Question 23

what are teh 3 branches of the facial n within the pertrous portion of temporal bone

Answer 23

greater petrosal
chorda tympani
nerve to stapedius

Question 24

greater petrosal n

Answer 24

carries axons of preganglionic parasymph neruons that are on their way to pterygopalatine galion

Question 25

chorda tympani

Answer 25

carry taste fibers and axons of preganglionic parasymphateic neurons

Question 26

hay fever

Answer 26

inhlation of pollen stimulates nerve terminals of nasal cavity superior salivatory nucleus stimulates which stimulated fivers in pterygopalatine glanlion

Question 27

how do you get crocodile tear syndrome

Answer 27

lesion in facial canal that damages n fibers located in facial n proximal to geniculate ganglion

Question 28

what is the symptom of crocodile tear syndrome

Answer 28

when the pt starts eating they start crying

Question 29

what is happening in crocodile tear syndrome

Answer 29

instead of axons growing to join chorda tympani they join the greater petrosal n as well

Question 30

what gives you a imitation smile

Answer 30

pyramidal system

Question 31

what gives you a a geniune (duchenne) smile

Answer 31

accessory motor area to reticular formation to facial nuclus and muscles of facial expression

Question 32

if you damage affarent limb (V1) and brush cotton over affect cornea

Answer 32

neither eye will blink

Question 33

if you damage affarent limb (V1) and brush cotton over unaffected eye

Answer 33

both eyes blink

Question 34

if you damage efferent limb (facial) and stimulate affected eye

Answer 34

unaffected eye will blink

Question 35

if you damage efferent limb (facial) and stimulate unaffected eye

Answer 35

unaffected eye will blink

Question 36

bell's palsy is an example of what type of lesion

Answer 36

LMN lesion

Question 37

what happens with CN VII LMN lesion

Answer 37

affected side paralyzed, unaffected normal

Question 38

what happens if you have corticonuclear fibers UMN lesion

Answer 38

weakenss, paralysis on contralatearl side of lower part of face