CN IX

Question 0

What muscle does CN IX innervate

Answer 0

stylopharyngeous

Question 1

CN IX has what type of fibers

Answer 1

Motor, sensory, autonomic

making it a mixed nerve

Question 2

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

Answer 2

superior part of the nucleus ambiguous

Question 3

CN IX: Preganglionic parasympathetic fibers arise from

Answer 3

inferior salivatory nucleus

Question 4

CN IX: Sensory afferent fibers terminate in

Answer 4

Solitary nucleus

Question 5

What are the 2 ganglion associated with CN IX

Answer 5

Superior ganglion (smaller) inferior ganglion (larger)

Question 6

Origin of glossopharyngeal nerve

Answer 6

superior lateral aspect of the medulla oblongata

Question 7

CN IX exits the skull via

Answer 7

jugular foramen

Question 8

CN IX exits posterior to what

Answer 8

septum

Question 9

Where do motor fibers carried in CN IX arise from?

Answer 9

nucleus ambiguous

Question 10

Preganglionic parasympathetic arise from

Answer 10

inferior salivatory nucleus

Question 11

Sensory fibers terminate where

Answer 11

solitary nucleus

Question 12

What are the 2 peripheral ganglion associated with CN IX

Answer 12

superior and inferior ganglion

Question 13

information conveyed to the CNS synapse where

Answer 13

spinal nucleus of trigeminal nerve CN V

Question 14

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

Answer 14

Superior part of the solitary nucleus

Question 15

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

Answer 15

inferior part of solitary nucleus

Question 16

Nucleus ambiguous innervates what nerves

Answer 16

IX, X, and XI

Question 17

Postganglionic Parasympathetic fibers synapse where

Answer 17

otic ganglion

Question 18

Postganglionic parasympathetic fibers supply partoid, buccal, and

Answer 18

inferior labial glands

Question 19

What is the apparent origin of CN IX

Answer 19

superior aspect of MO

Question 20

Where does CN IX exit

Answer 20

Jugular foramen

Question 21

Where is superior and inferior ganglion located

Answer 21

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

Question 22

What arises from the inferior ganglion?

Answer 22

tympanic nerve

Question 23

What does the tympanic nerve carry

Answer 23

preganglionic parasympathetic and sensory fibers

Question 24

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

Answer 24

tympanic canaliculus

Question 25

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

Answer 25

tympanic cavity

Question 26

tympanic nerve receives postganglionic SYMPATHETIC fibers from

Answer 26

superior cervical ganglion

Question 27

What is the path of the tympanic nerve?

Answer 27

Fibers carried through tympanic canaliculus to tympanic cavity

Question 28

What is the tympanic plexus and where is it?

Answer 28

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

Question 29

What kind of info does the tympanic plexus carry

Answer 29

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

Question 30

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

Answer 30

Pass through tympanic plexus and reform as lesser petrosal nerve

Question 31

Where does lesser petrosal nerve go?

Answer 31

travels through lesser petrosal canal to otic ganglion

Question 32

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

Answer 32

Carried in branches of CN V3 | to parotid, buccal, and inferior labial glands

Question 33

Where does the carotid branch enter the nerve?

Answer 33

ascends from below and enters at inferior ganglion

Question 34

what kind of info does carotid branch carry

Answer 34

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

Question 35

What info does pharyngeal branch carry

Answer 35

sensory from mucosa of pharynx

Question 36

what forms pharyngeal plexus and where

Answer 36

pharyngeal branches and some vagal branches | near middle pharyngeal plexus

Question 37

What does muscular branch supply

Answer 37

stylopharyngeous

Question 38

Tonsilar branch supplies what

Answer 38

sensory info from palatine and oral mucosa

Question 39

Lingual branch supplies what

Answer 39

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