quiz 3: CNs VIII and IX

Question 1

what is CN 8 called

Answer 1

vestibulocochlear nerve

Question 2

is CN 8 motor, sensory or mixed

Answer 2

sensory only

Question 3

where does the vestibular nerve terminate

Answer 3

vestibular nuclear complex

Question 4

what are the parts of the vestibular nuclear complex

Answer 4

superior, medial, lateral, and inferior

Question 5

where are cells bodies found from the vestibular nerve

Answer 5

vestibular ganglion

Question 6

what are the parts of the vestibular ganglion

Answer 6

inferior and superior

Question 7

where does the cochlear nerve terminate

Answer 7

anterior and posterior cochlear nuclei

Question 8

the cochlear nerve is composed of axons from the

Answer 8

spiral ganglion

Question 9

the cochlear nerve is made up of

Answer 9

bipolar neurons

Question 10

where do peripheral processes of the cochlear nerve extend from

Answer 10

the spiral ganglion to the spiral organ

Question 11

where are the 2 cochlear nuclei found

Answer 11

posterior, superior medulla oblongata

Question 12

what is the path of the cochlear axons

Answer 12

axons cross to the other side of the brainstem, synapse of the trapezoid nuclei, and form the lateral lemniscus

Question 13

where do peripheral processes of the vestibular ganglion extend to

Answer 13

the saccule, utricle, and the semicircular ducts

Question 14

where do central processes of the vestibular ganglion convey information to

Answer 14

vestibular nuclei

Question 15

where is the vestibular nuclei found

Answer 15

in the medulla oblongata on the floor of the rhomboid fossa

Question 16

where do most vestibular nerve fibers terminate

Answer 16

in the medial vestibular nucleus

Question 17

where do other vestibular nerve fibers travel to

Answer 17

directly to the cerebellum via the inferior cerebellar peduncle

Question 18

what is the apparent origin of CN 8

Answer 18

cerebellopontine recess

Question 19

where does CN 8 travel in

Answer 19

posterior cranial fossa

Question 20

where does CN 8 travel to

Answer 20

internal acoustic meatus

Question 21

how many fibers does the cochlear nerve carry

Answer 21

30-40,000

Question 22

what does the cochlear nerve traverse

Answer 22

the internal acoustic meatus, inferior to the facial nerve

Question 23

where does the cochlear nerve reach after it leaves the temporal bone

Answer 23

spiral ganglion

Question 24

how many fibers does the vestibular nerve carry

Answer 24

20,000

Question 25

what is the inferior branch of the vestibular nerve composed of

Answer 25

saccular and posterior ampullary nerves

Question 26

what does the inferior branch of the vestibular nerve supply

Answer 26

the saccule and the posterior ampullary crest

Question 27

what makes up the superior branch of the vestibular nerve

Answer 27

lateral and anterior ampullary nerves

Question 28

what does the superior branch of the vestibular nerve supply

Answer 28

lateral and anterior semicircular ducts

Question 29

what is the utricle supplied by

Answer 29

lateral ampullary nerve and a branch directly off of the superior branch

Question 30

what is voit's nerve

Answer 30

a direct branch from the superior branch of the vestibular nerve that supplies the saccule

Question 31

what is tinnitus

Answer 31

ringing in the ears

Question 32

is CN 9 sensory, motor or mixed

Answer 32

mixed: motor, sensory and autonomic fibers

Question 33

what is CN 9 motor to

Answer 33

stylopharyngeus muscle

Question 34

what is CN 9 sensory to

Answer 34

pharynx, posterior tongue

Question 35

what is CN 9 autonomic to

Answer 35

parasympathetic to parotid and other glands

Question 36

where are cell bodies found from the motor fibers of CN 9

Answer 36

superior part of the nucleus ambiguus

Question 37

preganglionic parasympathetic fibers arise from th

Answer 37

inferior salivary nucleus

Question 38

where do afferent fibers terminate

Answer 38

solitary nucleus

Question 39

what are the 2 peripheral ganglia associated with CN 9

Answer 39

superior and inferior ganglion

Question 40

which is smaller: the superior or inferior ganglion

Answer 40

superior

Question 41

where is general sensory information carried to

Answer 41

nasopharynx, oropharynx, posterior tongue, uvula, palatine tonsils

Question 42

general sensation of the ___ is also carried in a branch of CN 9

Answer 42

tympanic cavity

Question 43

where are general sensory cell bodies located

Answer 43

inferior ganglion

Question 44

where do general sensory fibers synapse

Answer 44

spinal nucleus of the trigeminal nerve

Question 45

taste information is carried by neurons from the

Answer 45

inferior ganglion

Question 46

taste information's axons synapse in the

Answer 46

superior part of the solitary nucleus

Question 47

some incoming fibers from the inferior ganglion synapse in the

Answer 47

lower part of the solitary nucleus

Question 48

visceral afferent information is carried from the

Answer 48

carotid sinus and body

Question 49

what nucleus contributes to lower motor neurons to CNs 9, 10, and 11

Answer 49

nucleus ambiguus

Question 50

the inferior salivary nucleus gives rise to ___ axons

Answer 50

preganglionic parasympathetic

Question 51

parasympathetic pathway fibers synapse in the

Answer 51

otic ganglion

Question 52

what do postganglionic parasympathetic fibers supply

Answer 52

parotid glands, buccal glands and inferior labial glands

Question 53

what is the apparent origin of CN 9

Answer 53

superior aspect of the medulla oblongata

Question 54

CN 9 exits the skull via the

Answer 54

jugular foramen

Question 55

where is the superior ganglion of CN 9 located

Answer 55

inside the cranium

Question 56

where is the inferior ganglion of CN 9 located

Answer 56

outside the cranium

Question 57

what arises from the inferior ganglion

Answer 57

tympanic nerve

Question 58

what kind of fibers does the tympanic nerve carry

Answer 58

preganglionic parasympathetic and sensory

Question 59

fibers are carried through the ___ into the tympanic cavity

Answer 59

tympanic canaliculus

Question 60

in the tympanic cavity, the tympanic nerve receives postganglionic sympathetic fibers from the superior cervical ganglion, forming the

Answer 60

tympanic plexus

Question 61

from where does the tympanic plexus carry information

Answer 61

tympanic cavity, pharyngotympanic tube and mastoid air cells

Question 62

preganglionic parasympathetic fibers pass through the tympanic plexus and reform as the

Answer 62

lesser petrosal nerve

Question 63

the lesser petrosal nerve passes through the lesser petrosal canal to the

Answer 63

otic ganglion

Question 64

postganglionic parasympathetic fibers from the otic ganglion are carried in branches of ___ to the ___

Answer 64

CN V3; parotid, buccal and inferior labial glands

Question 65

the carotid branch ascends from below and enters the nerve at the

Answer 65

inferior ganglion

Question 66

what does the carotid branch carry

Answer 66

afferent information from chemoreceptors in the carotid body and baroreceptors in the carotid sinus

Question 67

what do the pharyngeal branches supply

Answer 67

mucosa of the pharynx

Question 68

the pharyngeal branches will combine with some vagal branches to form the

Answer 68

pharyngeal plexus

Question 69

what is CN 9 motor to

Answer 69

stylopharyngeus

Question 70

what do the tonsillar branches supply

Answer 70

palatine tonsils and oral mucosa

Question 71

what do the lingual branches supply

Answer 71

sensory and taste from the posterior tongue