Vestibulocochlear - CN. VIII

Question 1

The vestibulocochlear nerve is?

Answer 1

Sensory

Question 2

What two nerves make up the vestibulocochlear nerve?

Answer 2

vestibular nerve and cochlear nerve

Question 3

The vestibular nerve terminates?

Answer 3

Vestibular nuclear complex

Question 4

Vestibular nuclear complex is composed of ?

Answer 4

superior, inferior, medial, and lateral parts

Question 5

Where is the vestibular ganglion located?

Answer 5

internal acoustic meatus

Question 6

What 3 inner ear structures does the vestibular ganglion extend to?

Answer 6

saccule, utricle, semicircular canals

Question 7

The vestibular ganglion extends central processes to where?

Answer 7

vestibular nuclei in the medulla oblongata on the floor of the rhomboid fossa

Question 8

Majority of vestibular nerve fibers terminate where?

Answer 8

medial vestibular nucleus (schwalbe)

Question 9

A few vestibular nerve fibers travel to?

Answer 9

Directly to the cerebellum by the inferior cerebellar peduncle

Question 10

What is the direction that information travels in the vestibulocochlear nerve?

Answer 10

distal to proximal

Question 11

What is the apparent origin of vestibulocochlear?

Answer 11

cerebellopontine angle (recess)

Question 12

Where does the nerve travel?

Answer 12

the posterior cranial fossa in the internal acoustic meatus

Question 13

The vestibulocochlear nerve enters along with what nerve?

Answer 13

Facial nerve (through the internal acoustic meatus)

Question 14

The cochlear nerve carries how many fibers inside the temporal bone?

Answer 14

30 ,000- 40,000 fibers along the inferior part of facial nerve

Question 15

cochlear nerve consists of?

Answer 15

Bipolar neurons

Question 16

Bipolar neurons

Answer 16

cell bodies in spiral ganglion of cochlea

Question 17

sensory nerve pathway for the cochlear nerve

Answer 17

spiral ganglion peripheral process (dendrites) extend from the cochlear to the spiral organ cochlear nerve to the superior/posterior part of M.O.

Question 18

cochlear terminate on 2 cochlear nuclei

Question 19

From the cochlear nuclei where do axons go?

Question 20

From the trapezoid nuclei where do axons go?

Question 21

What leaves the temporal bone and reaches the spiral ganglion of cochlea?

Answer 21

cochlear nerve

Question 22

The vestibular nerve carries how many fibers?

Answer 22

~20,000 fibers

Question 23

The vestibular nerve divides into what branches?

Question 24

The smaller inferior branch has how many fibers

Question 25

the smaller inferior branch is composed of?

Question 26

The saccular nerve and posterior ampullary nerve supply?

Question 27

The larger superior branch of the vestibular nerve has how many fibers?

Question 28

The larger superior branch of vestibular nerve if fromed by?

Question 29

The lateral and superior(ant) ampullary nerves supply?

Question 30

The utricle is supplied by?

Question 31

What nerve from the superior branch directly to saccule?

Answer 31

Voit’s Nerve

Question 32

Acoustic neuroma

Question 33

Tinnitus

Question 34

Cochlear implants

Question 35

Vestibular disease

Answer 35

• diff dx. from cervicogenic vertigo
• cervico - neck movements
• vertigo- feel dizzy sensation spinning
• hold head move patient in swival chair
• vertigo if experiences consistant with ~ 3 times