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PNS quizzes > quiz 3: CNs VIII and IX > Flashcards

quiz 3: CNs VIII and IX Flashcards

1
Q

what is CN 8 called

A

vestibulocochlear nerve

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2
Q

is CN 8 motor, sensory or mixed

A

sensory only

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3
Q

where does the vestibular nerve terminate

A

vestibular nuclear complex

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4
Q

what are the parts of the vestibular nuclear complex

A

superior, medial, lateral, and inferior

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5
Q

where are cells bodies found from the vestibular nerve

A

vestibular ganglion

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6
Q

what are the parts of the vestibular ganglion

A

inferior and superior

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7
Q

where does the cochlear nerve terminate

A

anterior and posterior cochlear nuclei

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8
Q

the cochlear nerve is composed of axons from the

A

spiral ganglion

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9
Q

the cochlear nerve is made up of

A

bipolar neurons

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10
Q

where do peripheral processes of the cochlear nerve extend from

A

the spiral ganglion to the spiral organ

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11
Q

where are the 2 cochlear nuclei found

A

posterior, superior medulla oblongata

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12
Q

what is the path of the cochlear axons

A

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

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13
Q

where do peripheral processes of the vestibular ganglion extend to

A

the saccule, utricle, and the semicircular ducts

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14
Q

where do central processes of the vestibular ganglion convey information to

A

vestibular nuclei

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15
Q

where is the vestibular nuclei found

A

in the medulla oblongata on the floor of the rhomboid fossa

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16
Q

where do most vestibular nerve fibers terminate

A

in the medial vestibular nucleus

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17
Q

where do other vestibular nerve fibers travel to

A

directly to the cerebellum via the inferior cerebellar peduncle

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18
Q

what is the apparent origin of CN 8

A

cerebellopontine recess

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19
Q

where does CN 8 travel in

A

posterior cranial fossa

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20
Q

where does CN 8 travel to

A

internal acoustic meatus

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21
Q

how many fibers does the cochlear nerve carry

A

30-40,000

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22
Q

what does the cochlear nerve traverse

A

the internal acoustic meatus, inferior to the facial nerve

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23
Q

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

A

spiral ganglion

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24
Q

how many fibers does the vestibular nerve carry

A

20,000

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25
Q

what is the inferior branch of the vestibular nerve composed of

A

saccular and posterior ampullary nerves

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26
Q

what does the inferior branch of the vestibular nerve supply

A

the saccule and the posterior ampullary crest

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27
Q

what makes up the superior branch of the vestibular nerve

A

lateral and anterior ampullary nerves

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28
Q

what does the superior branch of the vestibular nerve supply

A

lateral and anterior semicircular ducts

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29
Q

what is the utricle supplied by

A

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

30
Q

what is voit’s nerve

A

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

31
Q

what is tinnitus

A

ringing in the ears

32
Q

is CN 9 sensory, motor or mixed

A

mixed: motor, sensory and autonomic fibers

33
Q

what is CN 9 motor to

A

stylopharyngeus muscle

34
Q

what is CN 9 sensory to

A

pharynx, posterior tongue

35
Q

what is CN 9 autonomic to

A

parasympathetic to parotid and other glands

36
Q

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

A

superior part of the nucleus ambiguus

37
Q

preganglionic parasympathetic fibers arise from th

A

inferior salivary nucleus

38
Q

where do afferent fibers terminate

A

solitary nucleus

39
Q

what are the 2 peripheral ganglia associated with CN 9

A

superior and inferior ganglion

40
Q

which is smaller: the superior or inferior ganglion

A

superior

41
Q

where is general sensory information carried to

A

nasopharynx, oropharynx, posterior tongue, uvula, palatine tonsils

42
Q

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

A

tympanic cavity

43
Q

where are general sensory cell bodies located

A

inferior ganglion

44
Q

where do general sensory fibers synapse

A

spinal nucleus of the trigeminal nerve

45
Q

taste information is carried by neurons from the

A

inferior ganglion

46
Q

taste information’s axons synapse in the

A

superior part of the solitary nucleus

47
Q

some incoming fibers from the inferior ganglion synapse in the

A

lower part of the solitary nucleus

48
Q

visceral afferent information is carried from the

A

carotid sinus and body

49
Q

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

A

nucleus ambiguus

50
Q

the inferior salivary nucleus gives rise to ___ axons

A

preganglionic parasympathetic

51
Q

parasympathetic pathway fibers synapse in the

A

otic ganglion

52
Q

what do postganglionic parasympathetic fibers supply

A

parotid glands, buccal glands and inferior labial glands

53
Q

what is the apparent origin of CN 9

A

superior aspect of the medulla oblongata

54
Q

CN 9 exits the skull via the

A

jugular foramen

55
Q

where is the superior ganglion of CN 9 located

A

inside the cranium

56
Q

where is the inferior ganglion of CN 9 located

A

outside the cranium

57
Q

what arises from the inferior ganglion

A

tympanic nerve

58
Q

what kind of fibers does the tympanic nerve carry

A

preganglionic parasympathetic and sensory

59
Q

fibers are carried through the ___ into the tympanic cavity

A

tympanic canaliculus

60
Q

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

A

tympanic plexus

61
Q

from where does the tympanic plexus carry information

A

tympanic cavity, pharyngotympanic tube and mastoid air cells

62
Q

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

A

lesser petrosal nerve

63
Q

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

A

otic ganglion

64
Q

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

A

CN V3; parotid, buccal and inferior labial glands

65
Q

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

A

inferior ganglion

66
Q

what does the carotid branch carry

A

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

67
Q

what do the pharyngeal branches supply

A

mucosa of the pharynx

68
Q

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

A

pharyngeal plexus

69
Q

what is CN 9 motor to

A

stylopharyngeus

70
Q

what do the tonsillar branches supply

A

palatine tonsils and oral mucosa

71
Q

what do the lingual branches supply

A

sensory and taste from the posterior tongue

PNS quizzes (7 decks)

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