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PNS > Quiz CN 8&9 > Flashcards

Quiz CN 8&9 Flashcards

1
Q

Is CN 8 motor or sensory? What two nerves make it up?

A

Purely sensory

Vestibular nerve and cochlear nerve

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2
Q

The vestibular nerve terminates in what complex? And how many parts consist of it?

A

Terminates in the vestibular nuclear complex
Consists of four parts
Superior, medial, lateral, and inferior

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3
Q

Fibers carried in the vestibular nerve arise from cell bodies located in the _________.

A

Vestibular ganglion

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4
Q

The vestibular ganglion has how many parts?

A

Two parts

Superior and inferior parts

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5
Q

The cochlear nerve terminates where?

A

Terminates in two cochlear nuclei: anterior and posterior

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6
Q

The cochlear nerve is composed of axons from the _______.

A

Spiral ganglion

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7
Q

The cochlear nerve is made up of what kind of neurons whose cell bodies are in the spiral ganglion?

A

Made up of bipolar neurons

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8
Q

Peripheral processes (dendrites) extend from the spiral ganglion to what organ?

A

Spiral organ (organ of Corti)

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9
Q

Axons from the spiral organ are carried in what nerve to terminate on what two nuclei? These two nuclei are located in what areas?

A

Carried in the cochlear nerve
Terminate on the two cochlear nuclei
Located in posterior, superior medulla oblongata, lateral to the vestibular nuclei

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10
Q

From the cochlear nuclei, how do axons cross and synapse?

The axons form what specific structure?

A

Cochlear nuclei axons cross to the other side of brain stem and synapse in trapezoid nuclei
Axons form the lateral lemniscus

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11
Q

What is another name for the trapezoid nuclei?

A

Superior olivary nucleus

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12
Q

Peripheral processes from the vestibular ganglion extend to what three structures?

A

Three inner ear structures;

Saccule, utricle, and semicircular canals

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13
Q

Central processes from the vestibular ganglion convey information to what nuclei? And where is this nuclei located?

A

Conveys information to the vestibular nuclei, located in the medulla oblongata on the floor the rhomboid fossa

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14
Q

Most vestibular nerve fibers will terminate where?

A

Terminate in the medial vestibular nucleus (Schwalbe)

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15
Q

Some fibers will travel directly to what brain structure through this structure?

A

Travel directly to the cerebellum by way of inferior cerebellum peduncle

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16
Q

What is the apparent origin for the course of the vestibulocochlear nerve?

A

Cerebellopontine angle

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17
Q

The vestibulocochlear nerve travels what path to enter along with the facial nerve?

A

Travels in the posterior cranial fossa to the internal acoustic meatus, which it enters along with the facial nerve

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18
Q

Within the temporal bone:

The cochlear nerve carries how many fibers?

A

30-40,000 fibers.

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19
Q

Within the temporal bone:

The cochlear nerve traverses the internal acoustic meatus in what position to the facial nerve?

A

Inferior to the facial nerve

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20
Q

After the cochlear nerve leaves the temporal bone it reaches what structure?

A

The spiral ganglion of the cochlea

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21
Q

The vestibular nerve carries how many fibers?

A

20,000 fibers

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22
Q

As the vestibular nerve approaches the ear, it divides into what two branches?

A

Superior and inferior branches

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23
Q

The smaller inferior branch of the vestibular nerve is composed of what two nerves?

A

The saccular nerve and posterior ampullary nerve

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24
Q

The saccular nerve and posterior ampullary nerve supply what?

A

Supply the saccule and the posterior ampullary crest, respectively

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25
Q

The larger superior branch of the vestibular nerve is formed by what two nerves?

A

The lateral and anterior ampullary nerves

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26
Q

The lateral and anterior ampullary nerves supply what?

A

Supply the lateral and anterior semicircular canals

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27
Q

How is the utricle supplied?

A

Supplied by a branch from the lateral ampullary nerve and a branch directly off of the superior branch

28
Q

The superior branch of the vestibular nerve also sends a branch directly to the _____, which is called Voit’s nerve

A

Directly to the saccule

29
Q

What is an acoustic neuroma?

A

A vestibular schwanoma

30
Q

Tinnitus can be a 1st sign for what?

A

Meniere’s Disease

31
Q

What is Meniere’s Disease

A

Tinnitus, vertigo, hearing loss

32
Q

Cochlear implants help with what?

A

Sensory; neural hearing loss

33
Q

Vestibular disease can be detected through different detections of what?

A

Cervicogenic vertigo

34
Q

What kind of information does the glossopharyngeal nerve carry?

A

Motor, sensory, autonomic fibers

Mixed cranial nerve

35
Q

The glossopharyngeal nerve for motor innervation carries it to what muscle?
Sensory information from what?
Taste information from what?
Parasympathetic information leading ultimately to where?

A

Motor innervation to stylopharyngeus muscle
Sensory information from the pharynx
Taste information from posterior tongue
Parasympathetic information to the parotid and other glands

36
Q

Motor fibers carried in glossopharyngeal nerve arise from cell bodies located where?

A

Superior part of nucleus ambiguus

37
Q

Preganglionic parasympathetic fibers arise from what in the glossopharyngeal nerve?

A

Arise from inferior salivary nucleus

38
Q

Afferent, sensory fibers terminate where in the glossopharyngeal nerve?

A

Terminate in solitary nucleus

39
Q

How many peripheral ganglia are associated with the glossopharyngeal nerve?
What are they?
Which one is smaller?

A

Two peripheral ganglia
Superior and inferior
Superior ganglion is smaller and is usually thought of as a separated part of the inferior ganglion

40
Q

General sensory information is carried in the glossopharyngeal nerve branches form what parts?

A

From nasopharynx, oropharynx, and portion of the tongue posterior to the sulcus terminalis, uvula, and palatine tonsils

41
Q

General sensation from this structure is also carried in a branch of the glossopharyngeal nerve

A

Tympanic cavity

42
Q

The neurons for the tympanic cavity have cell bodies located in the _____. From there, information is conveyed to the CNS and fibers synapse in the ______ of this main nerve

A

Cell bodies located in the inferior ganglion

Fibers synapse in the spinal nucleus of the trigeminal nerve

43
Q

Taste information from the tongue posterior the sulcus terminalis is carried by neurons from this structure

A

Inferior ganglion

44
Q

Axons from the inferior ganglion for taste information synapse in what part of what nucleus

A

Superior part of the solitary nucleus

45
Q

Some incoming fibers from what ganglion synapse in what part of the solitary nucleus?

A

Inferior ganglion

Lower part of the solitary nucleus

46
Q

Those incoming fibers from the inferior ganglion carry what kind of information from the _____ and _____

A

Carry visceral afferent information from the carotid sinus and carotid body

47
Q

The nucleus ambiguus contributes what kind of motor neurons to what three cranial nerves?

A

Lower motor neurons

Cranial nerves 9, 10, 11

48
Q

Axons from lower motor neurons carried in CN 9 will innervate what muscle?

A

Stylopharyngeus muscle

49
Q

The inferior salivary nucleus gives rise to what kind of axons carried in the glossopharyngeal nerve

A

Preganglionic parasympathetic axons

50
Q

The preganglionic parasympathetic axons carried in the glossopharyngeal nerve will synapse in what ganglion, from which arise what postganglionic fibers that supply what three glands?

A

Synapse in the otic ganglion

Supply parotid, buccal, and inferior lablial glands

51
Q

What is the apparent origin of the glossopharyngeal nerve?

A

Lateral aspect of superior medulla oblongata

52
Q

The glossopharyngeal nerve exits the skull via the?

A

Jugular foramen

53
Q

Where are the superior and inferior ganglion located?

A

Superior ganglion located inside the cranium

Inferior ganglion located, beyond the jugular foramen, outside the cranium

54
Q

The tympanic nerve arises from what ganglion?

A

Inferior ganglion

55
Q

The tympanic nerve carries what two types of information?

These fibers are carried through the ____ into the ______.

A

Preganglionic parasympathetic and sensory fibers

Fibers are carried through the tympanic canaliculus into the tympanic cavity

56
Q

Once in the tympanic cavity, the tympanic nerve receives what kind of fibers from the superior cervical ganglion, and forms the _____

A

Receives postganglionic sympathetic fibers

Forms the tympanic plexus

57
Q

The tympanic plexus carries this kind of information from what three structures?

A

Carries somatosensory information

From tympanic cavity, pharyngotympanic tube, and the mastoid air cells

58
Q

The preganglionic parasympathetic fibers pass through the tympanic plexus and reform as the ______, which travels through the ____ to the ___ ganglion

A

Reform as lesser petrosal nerve
Travels through lesser petrosal canal
Otic ganglion

60
Q

The carotid branch ascends from below and enters the nerve at the _______.

A

Inferior ganglion

61
Q

The carotid branch ascends from below and enters the nerve at the _____. It carries ______ from chemoreceptors in the carotid body and baroreceptors in the _____.
Similar information may be carried in the _____ nerve

A

Inferior ganglion
Carries afferent information
In the carotid sinus
Vagus nerve

62
Q

Pharyngeal branches convert _____ information from the _______. These branches will combine with some ______ branches to from the ________ plexus near the _________ plexus.

A 
Sensory information
Mucosa of the pharynx
Vagal branches
Pharyngeal plexus
Middle pharyngeal plexus
63
Q

The muscular branch leaves the _______ nerve to supply one muscle, the ______

A

Glossopharyngeal nerve

Stylopharyngeus

64
Q

The remaining branches of the glossopharyngeal nerve reach the ______

A

Oral cavity

65
Q

Tonsillar branches convey _____ information from the _____ and ______

A

Sensory information
Palatine tonsils
Oral mucosa

66
Q

Lingual branches carry general ______ and _____ information from the ____, posterior to the ______

A

Sensory
Taste
Tongue
Sulcus terminalis

67
Q

The preganglionic parasympathetic fibers from the _____ ganglion are carried in branches of CN ___ to these three glands

A

Otic ganglion
CN mandibular nerve trigeminal
Parotid, buccal, and inferior labial glands

PNS (3 decks)

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