23 JULY 2019

Question 1

there are two divisions of fx of the vestibular system:

Answer 1

physically

visually

Question 2

the vestibular system’s job is to

Answer 2

keep you steady in the world

Question 3

the vestibular system contributes to

Answer 3

maintenance of balance and equilibrium

Question 4

list of fx of the vestibular system?

Answer 4

1. head movement
   - position related to gravity
2. gaze stabilization
3. postural adjustments
4. autonomic fx & consciousness

Question 5

all consciousness comes from the

Answer 5

cerebral cortex

Question 6

everything that goes to the cerebral cortex pass through the

Answer 6

thalamus

Question 7

teh vestibular apparatus includes five stsrcutures:

Answer 7

1. semiciruclar canals
2. vestibulocochlear N
3. utricle
4. saccule
5. cochlea

Question 8

how many semicircular canals are there?

Answer 8

three sets with two each so 6 total

Question 9

five things to know about the semicircular canals?

Answer 9

1. 3 per side
2. hair cells in fluid
3. determines baseline activity
4. deplorazation rise/ falls
5. paired activity

Question 10

when you turn your head AP does what to what ears?

Answer 10

the side you are turning to INCREASES

the side you are turning away from DECREASE

Question 11

acceleration means you

Answer 11

get more APs

Question 12

deceleration means you get

Answer 12

less APs

Question 13

so you when you turn your head which accelerates which decelerates

Answer 13

the side you are turning toward ACCELERATES

the side you are turning away from DECELERATES

Question 14

the “seaweed” if what

Answer 14

the hair cells

Question 15

what is the fx of the hair cells as seaweed

Answer 15

tells movement

Question 16

seaweed floats in what

Answer 16

fluid

Question 17

what do you find at semicircular

Answer 17

ampulla

Question 18

what does baseline activity mean

Answer 18

that the hair cells always send the signals

Question 19

paired activity means

Answer 19

that there are 3 semicircular canals that work together

Question 20

semicircular canals are

Answer 20

angular movement

Question 21

otolithic organ contains what

Answer 21

1. utricle

2. saccule

Question 22

utricle tells us

Answer 22

horizontal movement

Question 23

saccule tells us

Answer 23

vertical movement

Question 24

otoconia are

Answer 24

ear crystals

Question 25

fx of the otoconia are

Answer 25

move hairs "seaweed"

Question 26

what moves what with the otoconia and hair cells?

Answer 26

the hair cells move the otoconia

Question 27

otoconia allow what

Answer 27

your body to feel the pull of gravity

Question 28

vestibular nuclei is apart of what CN / pathway

Answer 28

CN VIII: VESTIBULAR DIVISION PATHWAY

Question 29

where is CN VIII tract/ pathway located

Answer 29

the pons-medulla junction

Question 30

during eye tracking what is the nystagmus part?

Answer 30

the really fast reset

Question 31

during eye tracking what is the reflex part?

Answer 31

the tracking

Question 32

difference between the optokinetic | reflex and nystagmus

Answer 32

``` nystagmus = just fast reset reflex = tracking ```

Question 33

list five locations that can have disorders occur there in the vestibular system

Answer 33

1. peripheral receptors 2. cranial nerve 8 3 brainstem nuclei 4. central porjections axons 5. corticp reception ares

Question 34

pushers' syndrome occurs at what location?

Answer 34

central projections axon | cortical reception areas

Question 35

s/s of vestibular dx include?

Answer 35

``` vertigo nausa/vomitting pathologic nystagmus dysequilibrium impaired gaze stabilization vestibular ataxia oscillopsia = no gaze stabilization ```

Question 36

oscillopsia means

Answer 36

complete lack of VOR | presents like the camera on C.O.P.S

Question 37

dysequilibrium means

Answer 37

you're off balance

Question 38

vertigo is

Answer 38

the feeling of spinning in the world

Question 39

pathologic nystagmus is when

Answer 39

you have oscillations of the eyes with no apparent & no appropriate stimulus

Question 40

impaired gaze stabilization means

Answer 40

that the VOR isn't working in 1 eye or both but it's just impaired

Question 41

vestibular ataxia is when

Answer 41

there is ataxia due to the vestibular system - unsteady movements - head problems

Question 42

if you had oscillopsia what would it look like

Answer 42

your eyes would follow your head no matter what | and the world around you is shaky all the time

Question 43

connections from the vestibular nuclei to cells of the vestibulospinal tracts would influence

Answer 43

conscious awareness of head position