CN VIII

Question 1

What CN is the vestibulocochlear Nerve?

Answer 1

CN VIII

Question 2

What kind of nerve is the vestibulocochlear nerve?

Answer 2

Sensory only

Question 3

How many nerves make up the vestibulocochlear nerve?

Answer 3

2

Question 4

What two nerves make up the vestibulocochlear nerve?

Answer 4

Vestibular nerve

Cochlear nerve

Question 5

What does the vestibulocochlear nerve deal with?

Answer 5

Hearing and equilibrium

Question 6

Where does the vestibular never terminate?

Answer 6

Vestibular nuclear complex

Question 7

What are the four parts making up the vestibular nuclear complex?

Answer 7

Superior
Medial
Lateral
Inferior

Question 8

What is another name for the superior part of the vestibular nuclear complex?

Answer 8

Bechterew

Question 9

What is another name for the medial part of the vestibular nuclear complex?

Answer 9

Schwalbe

Question 10

What is another name for the lateral part of the vestibular nuclear complex?

Answer 10

Deiter

Question 11

What cell bodies are found in the lateral (Deiter) part of the vestibular nuclear complex?

Answer 11

Cell bodies of the vestibulospinal fibers

Question 12

Where do fibers carried in the vestibular nerve arise from?

Answer 12

Cell bodies in the vestibular ganglion

Question 13

What are the parts of the vestibular ganglion?

Answer 13

Superior and inferior parts

Question 14

How many cochlear nuclei are there?

Answer 14

Anterior and posterior

Question 15

Where does the cochlear nerve terminate?

Answer 15

In the two cochlear nuclei

Question 16

Where are the cochlear nerve fibers cell bodies?

Answer 16

In the spiral ganglion of cochlea

Question 17

What is the cochlear nerve made of?

Answer 17

Bipolar neurons

Question 18

Where do the cochlear dendrites travel?

Answer 18

From spiral ganglia to spiral organ (organ of corti)

Question 19

What is the spiral organ of Corti?

Answer 19

Receptor for hearing

Question 20

How do the cochlear neurons travel?

Answer 20

Axons from the organ of corti carried in the cochlear nerve to the two vestibular nuclei

Question 21

Where are the cochlear nuclei found?

Answer 21

Posterior, superior medulla oblongata, lateral to the vestibular nuclei

Question 22

How do the cochlear axons travel from the cochlear nuclei to the trapezoid nuclei?

Answer 22

Axons cross to other side of brain stem synapse, form the lateral lemniscus

Question 23

How does the lateral lemniscus travel?

Answer 23

Ascending info

Question 24

Where do dendrites from the vestibular ganglion extend to?

Answer 24

Saccule
Utricle
Semicircular canals

Question 25

Where do axons from the vestibular ganglion send info to?

Answer 25

Vestibular nuclei in MO

Question 26

Where is the vestibular nuclei found?

Answer 26

In the medulla oblongata on the floor of the rhomboid fossa

Question 27

Where do most vestibular nerve fibers synapse?

Answer 27

Medial (schwalbe) vestibular nucleus

Question 28

Where will some of the vestibular nerve fibers terminate?

Answer 28

Directly to cerebellum via inferior cerebellar peduncle | Floccunodularlobe

Question 29

How does the info from the vestibulocochlear nerve travel?

Answer 29

Distal to proximal

Question 30

What is the apparent origin of the vestibulocochlear nerve?

Answer 30

Cerebellarpontine angle

Question 31

How does the vestibulocochlear nerve travel?

Answer 31

In posterior cranial fossa to the internal acoustic meatus

Question 32

What other nerve does the vestibulocochlear nerve enter the internal acoustic meatus with?

Answer 32

Facial nerve

Question 33

What bone does the vestibulocochlear nerve travel in?

Answer 33

Temporal bone

Question 34

Who many fibers does the cochlear nerve carry? ****

Answer 34

30,000-40,000

Question 35

How does the cochlear nerve travel in the temporal bone?

Answer 35

Transverses the internal acoustic meatus inferior to the facial nerve Leaves and reaches the spiral ganglion of cochlea

Question 36

How many fibers does the vestibular nerve carry?

Answer 36

20,000

Question 37

What does the vestibular nerve divide into?

Answer 37

Superior and inferior branches as it approaches the ear

Question 38

Which branch of the vestibular nerve is smaller?

Answer 38

Inferior branch

Question 39

How many fibers does the inferior vestibular never carry?

Answer 39

8,000

Question 40

What nerves make up the inferior branch of the vestibular nerve?

Answer 40

Saccular nerve | Posterior ampullary nerve

Question 41

What does the saccular nerve supply?

Answer 41

The saccule

Question 42

What does the posterior ampullary nerve supply?

Answer 42

The posterior ampullary crest

Question 43

How many fibers make up the superior vestibular branch?

Answer 43

12,000

Question 44

What nerves make up the superior vestibular branch?

Answer 44

Lateral ampullary nerve | Anterior ampullary nerve

Question 45

What do the lateral and anterior ampullary nerves supply?

Answer 45

Lateral and anterior semicircular canals

Question 46

What is the utricle supplied by?

Answer 46

A branch from the lateral ampullary nerve and a branch off of the superior vestibular branch

Question 47

What is Voit's nerve?

Answer 47

Branch directly off the superior vestibular branch supplying the saccule

Question 48

What is the saccule supplied by?

Answer 48

Voit's nerve

Question 49

What is an acoustic neuroma?

Answer 49

Tumor (vestibular schwanoma) Can be sizable Only affects one side Hearing and equilibrium problems

Question 50

What is tinnitus?

Answer 50

Ringing ears

Question 51

What are cochlear implants?

Answer 51

Helps with sensorineural hearing loss | Hot topic in deaf community

Question 52

What is vestibular disease?

Answer 52

Results in vertigo (spinning feeling)

Question 53

How is vestibular disease different than cervicogenic vertigo?

Answer 53

Cervicogenic vertigo you can produce by placing the patient on a spinning chair and slightly moving it

Question 54

What is the name of CN VIII?

Answer 54

Vestibulocochlear nerve