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PNS > exam 2 glossopharyngeal nerve > Flashcards

exam 2 glossopharyngeal nerve Flashcards

1
Q

the glossopharyngeal nerve is carries what type of information?

A

it is a mixed nerve that carries sensory, motor, and autonomic information

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2
Q

the motor fibers of the glossopharyngeal nerve arise from where?

A

cell bodies located in the superior part of the nucleus ambiguus

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3
Q

the preganglionic parasympathetic fibers of the glossopharyngeal arise from where?

A

inferior salivatory nucleus

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4
Q

afferent, sensory fibers of the glossopharyngeal nerve terminate where?

A

solitary nucleus

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5
Q

what are the two peripheral ganglia associated with the glossopharyngeal nerve?

A

the superior ganglion

the inferior ganglion

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6
Q

what is the correlation between the superior and inferior ganglia?

A

the superior ganglion is smaller and is thought to be a separated part of the inferior ganglion

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7
Q

general sensory informatio is carried from the glossopharyngeal nerve from where?

A 
Nasopharynx
Oropharynx
portion of tongue posterior to sulcus terminalis
uvula
palatine tonsils
tympanic cavity (by a branch)
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8
Q

where are the cell bodies for the general sensory pathway located?

A

inferior ganglion

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9
Q

as information from the inferior ganglion (general sensory) is conveyed to the CNS fibers will synapse where?

A

they will synapse in the spinal nucleus of the trigeminal nerve (pain and temp)

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10
Q

what more specific sensory information is carried from the tongue (posterior to the sulcus terminalis) to theinferior ganglion?

A

taste information

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11
Q

where do the taste information axons from the inferior ganglion extend to?

A

superior part of the solitary nucleus

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12
Q

axons from the inferior ganglion to the lower part of the solitary nucleus convey what information?

A

they carry visceral afferent information from the carotid sinus and carotid body
Baroreceptor and Chemoreceptor

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13
Q

the nucleus ambiguus contributes lower motor neurons to what three cranial nerves?

A

9, 10, 11

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14
Q

axons from the lower motor neurons of the nucleus ambigiuus carried in the glossopharyngeal will innervate what muscle?

A

stylopharyngeus

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15
Q

what nucleus gives rise to the preganglionic parasympathetic axons carried in the glossopharyngeal nerve?

A

inferior salivatory nucleus

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16
Q

what fibers synapse in the otic ganglion?

A

preganglionic parasympathetic fibers carried in the gossopharyngeal nerve originating from the inferior salivatory nucleus.
say it all!!

17
Q

what do the postganglionic fibers from the otic ganglion supply?

A

parotid glands
buccal glands
inferior labial glands

18
Q

what is the apparent origin of the glossopharyngeal nerve?

A

superior aspect of the medulla oblongata

19
Q

how does the glossopharyngeal nerve exit the skull?

A

jugular foramen

20
Q

where is the superior ganglion located? and the inferior ganglion?

A

the superior ganglion is located is located inside the cranium and the inferior is located beyond the jugular foramen outside the cranium

21
Q

where does the tympanic nerve originate from and what does it carry?

A

it arises from the inferior ganglion and it carries preganglionic parasympathetic fibers as well as sensory fibers.

22
Q

the fibers of the tympanic nerve pass through what, to reach the tympanic cavity?

A

tymapanic canaliculus

23
Q

what happens when the typmanic nerve enters the tymapanic cavity?

A

it receives postganglionic sympathetic fibers from the superior cervical ganglion and forms the tympanic plexus

24
Q

what is formed when the typanic nerve receives postganglionic sympathetic fibers from the superior cervical ganglion?

A

the tympanic plexus is formed

25
Q

what types of information does the typanic plexus carry and where from?

A

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

26
Q

the preganglionic parasympathetic fibers carried by the typmanic nerve pass through the tympanic plexus and reform to become what?

A

the lesser petrosal nerve

27
Q

where does the lesser petrosal nerve go after it is reformed from the preganglionic parasympathetic fibers of the tympanic nerve?

A

it passes through the lesser petrosal canal to the otic ganglion

28
Q

the postganglionic parasympathetic fibers from the the otic ganglion are carried in what nerve to supply what glands?

A

they are carried in branches of C.N 5 V3 (mandibular) to the parotid, buccal and inferior labial glands

29
Q

which visceral afferent branch ascends from below and enters the nerve at the inferior ganglion?

A

carotid branch

30
Q

what information is supplied by the carotid branch?

A

afferent of the chemoreceptors in the carotid body and baroreceptors in the carotid sinus

31
Q

what other nerve can carry information similar to the carotid branch?

A

the vagus nerve

32
Q

pharyngeal branches convey what information?

A

sensory information from the mucosa of the pharynx

33
Q

the pharyngeal branches will combine with vagal branches to form what?

A

the pharyngeal plexus

34
Q

the muscular branch of the glossopharyngeal leaves to supply what muscle?

A

stylopharyngeus

elevate larynx, pharynx, and dilate pharynx

35
Q

what information does the tonsilar branches carry?

A

sensory information from the palatine tonsils and oral mucosa

36
Q

what information does the lingual branches carry?

A

general sensory and taste information from the tongue (posterior to the sulcus terminals)

37
Q

clinical considerations?

A

difficulty swallowing
loss of taste
gag reflex

38
Q

the general sensory information of the lingual branch terminates where?

A

spinal nucleus of the trigeminal

39
Q

taste information of the lingual branch terminates where?

A

superior part of the solitary nucleus

PNS (6 decks)

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