The Vestibular System Flashcards

1
Q

What are the three semi circular canals in the vestibular system

A

anterior vertical, posterior vertical, horizontal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is located in the ampulla

A

sensory cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the semi-circular canals filled with

A

endolymph

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What detects linear motion

A

otolith organs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What detects rotational movement

A

semi circular canals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What does the saccule detect

A

movement in the vertical plane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What innervates the ampulla, saccule and utricle

A

vestibular nerve - 8

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

TRUE or FALSE - hair cells have a nucleus

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What potentials do hair cells of the vestibular system develop

A

graded potentials

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Describe the effect of decreased impulse frequency on hair cells

A

hyper polarisation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What do cochlear inner hair cells lose as they mature

A

kinocillium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What hair cells kept their kinocillium throughout their life

A

saccular hair cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Which type of vestibular hair cells are similar to inner hair cells

A

type 2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Which type of vestibular hair cells has calyx

A

type 1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What do the saccule and utricle detect

A

head tilt and linear acceleration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What stimulates the saccule and utricle

A

otolithic membrane

17
Q

What is the otolithic membrane

A

gelatinous structure

18
Q

Where does the otolithic membrane sit

A

top of hair cells

19
Q

What are otoconia

A

calcium carbonate crystals

20
Q

What does the otoconia sit on

A

otolithic membrane

21
Q

What is the function of the otolithic membrane

A

add weight

22
Q

What is information from saccule and utricle integrated with

A

proprioreceptors

23
Q

What is the cupula

A

jelly like structure

24
Q

what surrounds the cupula

25
True or false - hair cells stick up into the ampulla
true
26
What displaces the cupula
inertia of endolymph
27
Where do potentials from the vestibular organs travel to
cerebellum or vestibular nuclei
28
Why do some potentials go straight to the cerebellum
speed - prevent falling over
29
Why is the vestibular system faster than the visual system
uses ion channels
30
What causes menieres disease
excessive endolymph
31
What are the symptoms of menieres disease
intermittent vertigo, tinnitus
32
What are the vestibular hair cells
mechanoreceptors
33
What is the function of the vestibular nystagmus
reset eye position during head rotation