Unit 4

Question 1

Name the TWO nerves which make up the Vestibulocochlear nerve

Answer 1

-Vestibular N
&
-Cochlear N

Question 2

Where does the VESTIBULAR (branch of Vestibulocochlear) nerve terminate?

Answer 2

Vestibular Nuclear Complex

Question 3

What 4 parts does the VESTIBULAR NUCLEAR COMPLEX contain?

Answer 3

• Superior Nucleus
• Medial Nucleus
• Lateral Nucleus
• Inferior Nucleus

Question 4

Which PART of the Vestibular Nuclear Complex receives the majority of sensory fibers from the Vestibular Nerve?

Answer 4

Medial Nucleus!

Question 5

Name the eponym for the MEDIAL NUCLEUS part of the Vestibular Nuclear Complex…

Answer 5

Shwalbe Nucleus

Question 6

Where are CELL BODIES from the vestibular nerve located?

Answer 6

Vestibular Ganglion

Question 7

The Vestibular Ganglion has 2 parts.

T/F

Answer 7

TRUE.

Question 8

Name the 2 parts of the vestibular ganglion.

Answer 8

• Superior Part

- Inferior Part

Question 9

Name the 3 INNER EAR STRUCTURES to which the peripheral processes extend to.

Answer 9

• saccule
• utricle
• semicircular canals

Question 10

Where do CENTRAL PROCESSES from the VESTIBULAR GANGLION convey information to?

Answer 10

Vestibular Nuclei

MOSTLY the Medial Nucleus, aka shwalbe’ s nucleus

Question 11

Where are the Vestibular Nuclei located???

Answer 11

Medulla Oblongota
(Specifically, Floor of the RHOMBOID FOSSA w/in the M.O.)

Question 12

Although MOST fibers terminate in the medial nucleus part of the vestibular nuclear complex, SOME may actually travel directly to the CEREBELLUM.
(T/F)

Answer 12

TRUE.

Question 13

By way of ____________________ some fibers travel directly to the cerebellum

Answer 13

Inferior Cerebellar Peduncle

Question 14

How many fibers does the vestibular branch of the Vestibulocochlear nerve carry?

Answer 14

20,000

Question 15

How many fibers does the cochlear branch of the Vestibulocochlear nerve carry?

Answer 15

30-40,000

Question 16

Which Branch of the Vestibulocochlear nerve traverses the internal acoustic meatus inferior to the facial nerve?

Answer 16

Cochlear Nerve

Question 17

Which branch of CN VIII terminates into an anterior and a posterior nuclei?

Answer 17

Cochlear Nerve
(Terminates into ant/post cochlear nuclei)

Question 18

The cochlear nerve is made up of _______________.

Answer 18

Bipolar Neurons

Question 19

The bipolar cell bodies of the cochlear nerve are found within the______________ of the cochlea.

Answer 19

Spiral Ganglion

Question 20

The Vestibulocochlear N is composed of TWO nerves and is PURELY SENSORY.
(T/F)

Answer 20

TRUE

Question 21

Cochlear DENDRITES extend from the spiral ganglion to the _______________

Answer 21

Spiral Organ

Organ of Corti

Question 22

Another name for the Spiral Organ?

Answer 22

Organ of Corti

Question 23

Cochlear AXONS carried in the Cochlear N will terminate in _________________

Answer 23

TWO cochlear nuclei

Question 24

Name the 2 cochlear Nuclei

Answer 24

• anterior cochlear nucleus

- posterior cochlear nucleus

Question 25

Both Cochlear nuclei are located in the Posterior, Superior Medulla Oblongota LATERAL to the ____________________.

Answer 25

Vestibular Nuclei

Question 26

Name the 1st half of the Cochlear Pathway. (Reminder: pathway is purely sensory) Distal --> Proximal

Answer 26

- Bipolar Neuron Cell bodies @ Spiral Ganglion - Dendrites extend to Spiral Organ - Cochlear N carries axons to - Termination @Ant./Post. Cochlear Nuclei

Question 27

Name the 2nd half of the Cochlear Pathway.

Answer 27

After termination at cochlear nuclei, axons cross the brainstem and synapse in the TRAPEZOID NUCLEUS -Said axons will form the LATERAL LEMNISCUS

Question 28

The vestibular N. Divides into a superior and inferior branch. Of the two branches, which is smaller?

Answer 28

Inferior Branch (Approx 8,000 / 20,000)

Question 29

Which two nerves compose the inferior branch?

Answer 29

- Saccular N | - Posterior Ampullary N.

Question 30

Which nerve of the Inferior branch of the vestibular nerve will supply the Saccule?

Answer 30

Saccular Nerve

Question 31

Which nerve of the inferior branch of the Vestibular Nerve will supply the Posterior Ampullary Crest?

Answer 31

Posterior Ampullary Nerve

Question 32

Which of the Two branches of the Vestibular Nerve is larger, carrying about 12,000 of the 20,000 fibers?

Answer 32

Superior Branch

Question 33

Which two nerves form the Superior Branch of the Vestibular Nerve?

Answer 33

- Anterior Ampullary N | - Lateral Ampullary N

Question 34

What do the Lateral and Anterior Ampullary Nerves of the Superior Branch of the Vetsibular Nerve supply?

Answer 34

Lateral and Anterior Semicircular Canals

Question 35

The utricle is supplied by 2 branches. One branch stems from the ___________________ while the other branch is given off directly from the ___________________ of the Vestibular Nerve.

Answer 35

Lateral Ampullary Nerve Superior Branch

Question 36

The Superior Branch also sends a branch directly to the Saccule termed, _________'s nerve.

Answer 36

Voit's

Question 37

Name both terms given to a tumor involving the myelinating Schwan Cells

Answer 37

Acoustic Neuroma aka Vestibular Shwanoma

Question 38

"Ringing in the ears"

Answer 38

Tinnitus

Question 39

Tinnitus may also be the first sign of _________________

Answer 39

Meniere's Disease

Question 40

Cochlear Implants may be indicative of ________________________ hearing loss.

Answer 40

Sensorineuronal

Question 41

Which Disease can be a differential diagnosis from Cervicogenic Vertigo and can also be tested with a swivel chair?

Answer 41

Vestibular Disease

Question 42

The Glossopharyngeal N is a mixed cranial nerve carrying motor, sensory, and autonomic fibers. (T/F)

Answer 42

TRUE.