Exam 2- CN 8

Question 1

The vestibulocochlear nerve is purely

Answer 1

Sensory

Question 2

How many nerves is the vestibular cochlear nerve made out of?

Answer 2

2

Vestibular

Cochlear

Question 3

Where does the vestibular nerve terminate

Answer 3

In the vestibular nuclear complex

Question 4

How many parts are in the vestibular nuclear complex

Answer 4

4

Superior, medial, lateral, inferior

Question 5

Where do most of the vestibularcochlear nerves terminate in the vestibular nuclear complex

Answer 5

Medial aspect

Aka Schwalbe

Question 6

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

Answer 6

Vestibular ganglion

Question 7

The vestibular ganglion has how many parts

Answer 7

2

Superior, Inferior

Question 8

Where does the cochlear nerve terminate

Answer 8

2 cochlear nuclei

Anterior and posterior

Composed of axons from the spiral ganglion

Question 9

THe cochlear nerve is made up of _________ neurons who’s cell bodies are in the ________ ganglion of the cochlea

Answer 9

Bipolar, spiral

Question 10

Where are the two cochlear nuclei located

Answer 10

The posterior superior medulla oblongata, lateral to the vestibular nuclei

Question 11

Once axons reach the cochlear nuclei they cross and go to the other side of the brainstem and synapse in the

Answer 11

Trapezoid nuclei, from which axons form the lateral lemniscus

Question 12

Peripheral processes from the vestibular ganglion extend to what 3 inner ear structures

Answer 12

Saccule, the utricle, and the semicircular canals

Question 13

What is another name for the medial vestibular nucleus

Answer 13

Schwalbe

Question 14

Fibers from the vestibular nuclei will travel directly to the cerebellum via the

Answer 14

Inferior cerebellum peduncle

Question 15

What is the apparent origin of the vestibulocochlear nerve

Answer 15

Cerebellopontine angle

Question 16

Information from the vestibulocochlear nerve travel in what direction

Answer 16

Distal to proximal

Question 17

How many fibers does the cochlear nerve carry

Answer 17

30-40,000

Question 18

The cochlear nerve traverses the internal acoustic meatus ______ to the facial nerve

Answer 18

Inferior

Question 19

After the cochlear nerve leaves the temporal bone it reaches the

Answer 19

Spiral ganglion of the cochlea

Question 20

The vestibular nerve carries how many fibers

Answer 20

20,000

Question 21

The inferior branch of the vestibular nerve carries

Answer 21

8,000 fibers

Question 22

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

Answer 22

Saccular nerve, posterior ampullary nerve

Question 23

The superior branch of the vestibular nerve has

Answer 23

12,000 fibers

Formed by the lateral and anterior ampullary nerves

Question 24

The utricle is supplied by

Answer 24

A branch from the lateral ampullary nerve and a branch directly off the superior branch

Question 25

What is Voit’s nerve

Answer 25

The superior branch sending a branch directly to the saccule