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Flashcards in CN IX Deck (51)
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1

What is the name for CN IX?

Glossopharyngeal (Go to Vegas)

2

What kind of fibers are carried by CN IX?

motor, sensory, and autonomic fibers

3

What muscle does CN IX send motor fibers to?

stylopharyngeus

4

What kind of info does CN IX carry from the pharynx?

sensory, including taste info from the posterior tongue

5

Where does CN IX send (ultimately) parasympathetic info?

parotid gland

6

Where are the cell bodies for motor fibers in CN IX?

nucleus ambiguus

7

Specifically, what kind of motor fibers are carried by CN IX?

Branchiomotor fibers

8

Where do branchiomotor fibers develop from embryologically?

pharyngeal arches or branchial fibers NOT somites

9

What is the nucleus of origin for preganglionic parasympathetic fibers carried in CN IX?

Inferior Salivatory Nucleus

10

Where do afferent sensory fibers of CN IX terminate?

solitary nucleus

11

What other CN is associated with the solitary nucleus?

CN VII

12

What two peripheral ganglia are associated with CN IX?

superior and inferior ganglion

13

T/F: the inferior ganglion is smaller and usually thought of as a separated part of the superior ganglion.

False; vice-versa (superior is smaller and thought to be a separated part of the inferior ganglion)

14

Where all is general sensory carried from in CN IX?

from nasopharynx, oropharynx, portion of the tongue posterior to sulcus terminalis, uvula, and palatine tonsils. (NO PT U PT or NOT U Please)

15

What cavity has general sensation carried in a branch of the glossopharyngeal nerve?

tympanic cavity

16

General sensation neurons carried in CN IX have cell bodies in which ganglion? Where do they synapse in the CNS?

inferior (Snell book says superior); spinal nucleus of the trigeminal
(this question is pending confirmation from Torgerud)

17

Taste info from posterior of the sulcus terminalis (posterior 1/3 of the tongue) is carried by neurons from which ganglion?Axons from these cells synapse where?

inferior ganglion; superior part of the solitary nucleus

18

Cells carrying visceral afferent info from the carotid sinus and carotid body synapse where?

in the lower part of the solitary nucleus

19

What nucleus contributes lower motor neurons to CN IX? What other cranial nerves does this nucleus contribute to?

nucleus ambiguus; also contributes to X and XI

20

What muscle(s) is/are innervated by CN IX?

stylopharyngeus muscle

21

What kind of fibers does the inferior salivatory nucleus give rise to in CN IX? Where do these fibers synapse?

preganglionic parasympathetic; otic ganglion

22

Postganglionic fibers arising fro the otic ganglion supply which structures?

parotid, buccal, and inferior labial glands

23

Where is the apparent origin of the glossopharyngeal nerve?

superior, lateral aspec of the MO

24

Where does CN IX exit the skull?

jugular foramen

25

The jugular foramen has a septum which divides it into anterior and posterior compartments. Which compartment is the glossopharyngeal nerve found in?

posterior

26

T/F: the superior ganglion is located just beyond the jugular foramen, outside of the cranium.

False; this is true of the inferior ganglion but the superior ganglion is located within the cranium

27

Where does the tympanic nerve arise from?

the inferior ganglion

28

What kind of fibers are carried by the tympanic nerve?

preganglionic parasympathetic fibers and somatosensory fibers

29

What structure does the tympanic nerve travel through to get to the tympanic cavity?

tympanic canaliculus

30

Where is the superior cervical ganglion?

superior part of the sympathetic trunk