Exam IV-Vestibular Flashcards Preview

Neuroscience > Exam IV-Vestibular > Flashcards

Flashcards in Exam IV-Vestibular Deck (17):
1

Where do the semicircular canals terminate?

the utricle (after the ampulla of coarse)

2

Is the horizontal canal usually next to the anterior or posterior canal?

Posterior

3

Where are the vestibular hair cells?

The AMPULLA

4

What is the gelatinous mass surrounding the vestibular hair cells?

The CUPula

5

Is the cell depolarized or hyperpolerized when the stereocillia move TOWARD the kinocillia?

TO the Kinocillia = DEpolarization

6

What are the utricle and saccule?

Otolith organs

7

Fxn of utricle?

Forward and backward acceleration

8

Fxn of saccule?

VERTICLE displacements

9

Which plane is the macula of the utricle in?

Horizontal plane

10

Which plane is the macula of the saccule in?

vertical plane

11

What is the main tract for the SVN pathway? Where does it go?

CEREBELLUM...MLF!

12

What is the main tract for the LVN? Where does it go?

CORTEX...vestibulospinal tract...to the cotex for perception of balance

13

What is the main tract for the MVN? Where does it go?

EYE...coordinates eye movement. uses MLF & vestibulospinal tracts

14

What is the tract, function, and destination of IVN?

CEREBELLUM & RETICULAR formation...postural control uses contra vestibular nuclei

15

What causes BPPV?

CupoloLithasis and Canalithasis

16

Which disease is an over production or lack of absorption of endolymph?

Meniere' Disease both auditory and vestibular!!

17

When turning the head to the left, which eye muscles and CNs are stimulated to keep eyes forward?

The L eye's medial rectus and there for CN III. The R eye's Lateral Rectus and therefore CN VI.