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Peripheral Nervous System > Unit 4 > Flashcards

Unit 4 Flashcards

1
Q

Name the TWO nerves which make up the Vestibulocochlear nerve

A

-Vestibular N
&
-Cochlear N

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2
Q

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

A

Vestibular Nuclear Complex

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3
Q

What 4 parts does the VESTIBULAR NUCLEAR COMPLEX contain?

A
  • Superior Nucleus
  • Medial Nucleus
  • Lateral Nucleus
  • Inferior Nucleus
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4
Q

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

A

Medial Nucleus!

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5
Q

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

A

Shwalbe Nucleus

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6
Q

Where are CELL BODIES from the vestibular nerve located?

A

Vestibular Ganglion

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7
Q

The Vestibular Ganglion has 2 parts.

T/F

A

TRUE.

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8
Q

Name the 2 parts of the vestibular ganglion.

A
  • Superior Part

- Inferior Part

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9
Q

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

A
  • saccule
  • utricle
  • semicircular canals
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10
Q

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

A

Vestibular Nuclei

MOSTLY the Medial Nucleus, aka shwalbe’ s nucleus

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11
Q

Where are the Vestibular Nuclei located???

A 
Medulla Oblongota
(Specifically, Floor of the RHOMBOID FOSSA w/in the M.O.)
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12
Q

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

A

TRUE.

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13
Q

By way of ____________________ some fibers travel directly to the cerebellum

A

Inferior Cerebellar Peduncle

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14
Q

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

A

20,000

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15
Q

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

A

30-40,000

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16
Q

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

A

Cochlear Nerve

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17
Q

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

A 
Cochlear Nerve
(Terminates into ant/post cochlear nuclei)
18
Q

The cochlear nerve is made up of _______________.

A

Bipolar Neurons

19
Q

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

A

Spiral Ganglion

20
Q

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

A

TRUE

21
Q

Cochlear DENDRITES extend from the spiral ganglion to the _______________

A

Spiral Organ

Organ of Corti

22
Q

Another name for the Spiral Organ?

A

Organ of Corti

23
Q

Cochlear AXONS carried in the Cochlear N will terminate in _________________

A

TWO cochlear nuclei

24
Q

Name the 2 cochlear Nuclei

A
  • anterior cochlear nucleus

- posterior cochlear nucleus

25
Q

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

A

Vestibular Nuclei

26
Q

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

A
  • Bipolar Neuron Cell bodies @ Spiral Ganglion
  • Dendrites extend to Spiral Organ
  • Cochlear N carries axons to
  • Termination @Ant./Post. Cochlear Nuclei
27
Q

Name the 2nd half of the Cochlear Pathway.

A

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

28
Q

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

A

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

29
Q

Which two nerves compose the inferior branch?

A
  • Saccular N

- Posterior Ampullary N.

30
Q

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

A

Saccular Nerve

31
Q

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

A

Posterior Ampullary Nerve

32
Q

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

A

Superior Branch

33
Q

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

A
  • Anterior Ampullary N

- Lateral Ampullary N

34
Q

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

A

Lateral and Anterior Semicircular Canals

35
Q

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.

A

Lateral Ampullary Nerve

Superior Branch

36
Q

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

A

Voit’s

37
Q

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

A

Acoustic Neuroma aka Vestibular Shwanoma

38
Q

“Ringing in the ears”

A

Tinnitus

39
Q

Tinnitus may also be the first sign of _________________

A

Meniere’s Disease

40
Q

Cochlear Implants may be indicative of ________________________ hearing loss.

A

Sensorineuronal

41
Q

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

A

Vestibular Disease

42
Q

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

A

TRUE.

Peripheral Nervous System (1 decks)

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