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PNS exam 2 > CN IX > Flashcards

CN IX Flashcards

0
Q

What muscle does CN IX innervate

A

stylopharyngeous

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1
Q

CN IX has what type of fibers

A

Motor, sensory, autonomic

making it a mixed nerve

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2
Q

where do the motor fibers arise from in the glossopharyngeal n.

A

superior part of the nucleus ambiguous

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3
Q

CN IX: Preganglionic parasympathetic fibers arise from

A

inferior salivatory nucleus

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4
Q

CN IX: Sensory afferent fibers terminate in

A

Solitary nucleus

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5
Q

What are the 2 ganglion associated with CN IX

A

Superior ganglion (smaller) inferior ganglion (larger)

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6
Q

Origin of glossopharyngeal nerve

A

superior lateral aspect of the medulla oblongata

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7
Q

CN IX exits the skull via

A

jugular foramen

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8
Q

CN IX exits posterior to what

A

septum

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9
Q

Where do motor fibers carried in CN IX arise from?

A

nucleus ambiguous

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10
Q

Preganglionic parasympathetic arise from

A

inferior salivatory nucleus

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11
Q

Sensory fibers terminate where

A

solitary nucleus

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12
Q

What are the 2 peripheral ganglion associated with CN IX

A

superior and inferior ganglion

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13
Q

information conveyed to the CNS synapse where

A

spinal nucleus of trigeminal nerve CN V

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14
Q

Taste info posterior to sulcus terminalis is carried in the inferior ganglion and synapses where

A

Superior part of the solitary nucleus

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15
Q

Visceral afferent info from carotid sinus and body carried in the inferior ganglion to synapse where

A

inferior part of solitary nucleus

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16
Q

Nucleus ambiguous innervates what nerves

A

IX, X, and XI

17
Q

Postganglionic Parasympathetic fibers synapse where

A

otic ganglion

18
Q

Postganglionic parasympathetic fibers supply partoid, buccal, and

A

inferior labial glands

19
Q

What is the apparent origin of CN IX

A

superior aspect of MO

20
Q

Where does CN IX exit

A

Jugular foramen

21
Q

Where is superior and inferior ganglion located

A

superior: inside cranium
inferior: beyond jugular foramen, outside cranium

22
Q

What arises from the inferior ganglion?

A

tympanic nerve

23
Q

What does the tympanic nerve carry

A

preganglionic parasympathetic and sensory fibers

24
Q

tympanic nerve splits off the inferior ganglion and fibers are carried through what

A

tympanic canaliculus

25
Q

after tympanic nerve fibers pass through tympanic canaliculus what do they go into

A

tympanic cavity

26
Q

tympanic nerve receives postganglionic SYMPATHETIC fibers from

A

superior cervical ganglion

27
Q

What is the path of the tympanic nerve?

A

Fibers carried through tympanic canaliculus to tympanic cavity

28
Q

What is the tympanic plexus and where is it?

A

Fibers from tympanic nerve and postganglionic sympathetic fibers from superior cervical ganglion
located in tympanic cavity

29
Q

What kind of info does the tympanic plexus carry

A

somatosensory from tympanic cavity, pharyngotympanic tube, and mastoid air cells

30
Q

What happens to the pregang parasym fibers originally carried in tympanic nerve

A

Pass through tympanic plexus and reform as lesser petrosal nerve

31
Q

Where does lesser petrosal nerve go?

A

travels through lesser petrosal canal to otic ganglion

32
Q

where are postganglionic parasym fibers from otic ganglion carried and in what

A

Carried in branches of CN V3

to parotid, buccal, and inferior labial glands

33
Q

Where does the carotid branch enter the nerve?

A

ascends from below and enters at inferior ganglion

34
Q

what kind of info does carotid branch carry

A

afferent info from chemoreceptors in carotid body and baroreceptors in carotid sinus
similar to info carried in vagus

35
Q

What info does pharyngeal branch carry

A

sensory from mucosa of pharynx

36
Q

what forms pharyngeal plexus and where

A

pharyngeal branches and some vagal branches

near middle pharyngeal plexus

37
Q

What does muscular branch supply

A

stylopharyngeous

38
Q

Tonsilar branch supplies what

A

sensory info from palatine and oral mucosa

39
Q

Lingual branch supplies what

A

genera sensory and taste info from tongue, posterior to sulcus terminalis

PNS exam 2 (7 decks)

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