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Flashcards in Exam 2 CN VIII Deck (39)
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1

Is the vestibulocochlear nerve sensory or motor?

It is purely sensory

2

T/F the vestibulocochlear nerve is made up of two nerves the vestibular nerve and the cochlear nerve

True

3

Where does the vestibular nerve terminate (non-specific)

In the vestibular nuclear complex

4

What parts make up the vestibular nuclear complex

Superior, medial, lateral, and inferior

5

Fibers carried in the vestibular nerve arise from cell bodies located where?

In the vestibular ganglion

6

What two parts make up the vestibular ganglion

Inferior and superior parts

7

Where does the cochlear nerve terminate

Terminates in two nuclei; anterior and posterior

8

What is the cochlear nerve composed of primarily

Composed of axons from spiral ganglion

9

What is the cochlear nerve made up of

Bipolar neurons

10

Where are the cell bodies located for the bipolar neurons of the cochlear nerve

Located in the spiral ganglion

11

What extends from the spiral ganglion to the spiral organ?

Peripheral processes (dendrites)

12

What is another name for the spiral organ

Organ of Corti

13

Axons from the cell bodies of the cochlear nerve are carried to where

They are carried to two cochlear nuclei, located in the posterior, superior M.O. , lateral to vestibular nuclei where they terminate

14

From the cochlear nuclei, axons cross to where and then synapse where?

The other side of the brainstem and synapse in the trapezoid nuclei

15

After axons from the cochlear nerve synapse in the trapezoid nuclei what do they then form

The axons form the lateral lemniscus

16

What 3 inner ear structures do the peripheral processes of the vestibular ganglion extend to

The saccule, utricle, and semicircular canals

17

What convey information to the vestibular nuclei and where are they from?

Central processes from the vestibular ganglion

18

Where is the vestibular nuclei located?

In the MO on the floor of the rhomboid fossa

19

Where do most vestibular nerve fibers terminate (specific)

In the medial vestibular nucleus or Schwalbe

20

Some vestibular fibers travel directly to the cerebellum by way of what

The inferior cerebellar peduncle

21

What way does information of the vestibulocochlear travel

Distal to proximal

22

What is the apparent origin of the vestibulocochlear nerve

The cerebellopontine angle

23

Where does the vestibulocochlear nerve travel within on its way to the internal acoustic meatus

Posterior cranial fossa where it enters along with the facial nerve

24

How many fibers does the cochlear nerve carry within the temporal bone

30-40,000

25

How many fibers does the vestibular nerve carry in the temporal bone

About 20,000

26

As the vestibular nerve travels within the temporal bone what happens as it approaches the ear

It divides into superior and inferior branches

27

How many fibers makeup the smaller inferior branch of the vestibular nerve

About 8,000

28

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

The saccular nerve and the posterior ampullary nerve

29

What do the saccule and posterior ampullary nerve supply

The saccule and posterior ampullary nerve crest

30

How many fibers make up the larger superior branch of the vestibular nerve

About 12,000 fibers