quiz 3: CNs VIII and IX Flashcards Preview

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Flashcards in quiz 3: CNs VIII and IX Deck (71):
1

what is CN 8 called

vestibulocochlear nerve

2

is CN 8 motor, sensory or mixed

sensory only

3

where does the vestibular nerve terminate

vestibular nuclear complex

4

what are the parts of the vestibular nuclear complex

superior, medial, lateral, and inferior

5

where are cells bodies found from the vestibular nerve

vestibular ganglion

6

what are the parts of the vestibular ganglion

inferior and superior

7

where does the cochlear nerve terminate

anterior and posterior cochlear nuclei

8

the cochlear nerve is composed of axons from the

spiral ganglion

9

the cochlear nerve is made up of

bipolar neurons

10

where do peripheral processes of the cochlear nerve extend from

the spiral ganglion to the spiral organ

11

where are the 2 cochlear nuclei found

posterior, superior medulla oblongata

12

what is the path of the cochlear axons

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

13

where do peripheral processes of the vestibular ganglion extend to

the saccule, utricle, and the semicircular ducts

14

where do central processes of the vestibular ganglion convey information to

vestibular nuclei

15

where is the vestibular nuclei found

in the medulla oblongata on the floor of the rhomboid fossa

16

where do most vestibular nerve fibers terminate

in the medial vestibular nucleus

17

where do other vestibular nerve fibers travel to

directly to the cerebellum via the inferior cerebellar peduncle

18

what is the apparent origin of CN 8

cerebellopontine recess

19

where does CN 8 travel in

posterior cranial fossa

20

where does CN 8 travel to

internal acoustic meatus

21

how many fibers does the cochlear nerve carry

30-40,000

22

what does the cochlear nerve traverse

the internal acoustic meatus, inferior to the facial nerve

23

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

spiral ganglion

24

how many fibers does the vestibular nerve carry

20,000

25

what is the inferior branch of the vestibular nerve composed of

saccular and posterior ampullary nerves

26

what does the inferior branch of the vestibular nerve supply

the saccule and the posterior ampullary crest

27

what makes up the superior branch of the vestibular nerve

lateral and anterior ampullary nerves

28

what does the superior branch of the vestibular nerve supply

lateral and anterior semicircular ducts

29

what is the utricle supplied by

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

30

what is voit's nerve

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

31

what is tinnitus

ringing in the ears

32

is CN 9 sensory, motor or mixed

mixed: motor, sensory and autonomic fibers

33

what is CN 9 motor to

stylopharyngeus muscle

34

what is CN 9 sensory to

pharynx, posterior tongue

35

what is CN 9 autonomic to

parasympathetic to parotid and other glands

36

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

superior part of the nucleus ambiguus

37

preganglionic parasympathetic fibers arise from th

inferior salivary nucleus

38

where do afferent fibers terminate

solitary nucleus

39

what are the 2 peripheral ganglia associated with CN 9

superior and inferior ganglion

40

which is smaller: the superior or inferior ganglion

superior

41

where is general sensory information carried to

nasopharynx, oropharynx, posterior tongue, uvula, palatine tonsils

42

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

tympanic cavity

43

where are general sensory cell bodies located

inferior ganglion

44

where do general sensory fibers synapse

spinal nucleus of the trigeminal nerve

45

taste information is carried by neurons from the

inferior ganglion

46

taste information's axons synapse in the

superior part of the solitary nucleus

47

some incoming fibers from the inferior ganglion synapse in the

lower part of the solitary nucleus

48

visceral afferent information is carried from the

carotid sinus and body

49

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

nucleus ambiguus

50

the inferior salivary nucleus gives rise to ___ axons

preganglionic parasympathetic

51

parasympathetic pathway fibers synapse in the

otic ganglion

52

what do postganglionic parasympathetic fibers supply

parotid glands, buccal glands and inferior labial glands

53

what is the apparent origin of CN 9

superior aspect of the medulla oblongata

54

CN 9 exits the skull via the

jugular foramen

55

where is the superior ganglion of CN 9 located

inside the cranium

56

where is the inferior ganglion of CN 9 located

outside the cranium

57

what arises from the inferior ganglion

tympanic nerve

58

what kind of fibers does the tympanic nerve carry

preganglionic parasympathetic and sensory

59

fibers are carried through the ___ into the tympanic cavity

tympanic canaliculus

60

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

tympanic plexus

61

from where does the tympanic plexus carry information

tympanic cavity, pharyngotympanic tube and mastoid air cells

62

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

lesser petrosal nerve

63

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

otic ganglion

64

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

CN V3; parotid, buccal and inferior labial glands

65

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

inferior ganglion

66

what does the carotid branch carry

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

67

what do the pharyngeal branches supply

mucosa of the pharynx

68

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

pharyngeal plexus

69

what is CN 9 motor to

stylopharyngeus

70

what do the tonsillar branches supply

palatine tonsils and oral mucosa

71

what do the lingual branches supply

sensory and taste from the posterior tongue