Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Maturity II Final > Vestibular > Flashcards

Vestibular Flashcards

1
Q

What makes up the peripheral system?

A

semicircular canals, otolith organs, CN 8

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

What makes up the central system?

A

vestibular nuclei, cerebellum

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

What makes up the output system?

A

ocular mm
spinal cord/ postural mm
VOR and VSR

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

What is the otolith organs?

A

sensitive to gravity and detects acc/decel

made up of Saccule & Utricle

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

What are the semicircular canals?

A

right angle to each other, 3 parts ANT, POST, HORZ

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

What are Otolith Organs?

A

has hair cells, gel layer, otoconia

and it mediates VSR

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

What are those crystal cells called? and where are they?

A

otoconia in the Otolith Organs

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

How does the semicircular canals work?

A

detects angular velocity by using functional pairs of firing rates

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

What is the peripheral vestibular system’s resting neuronal firing rate?

A

70-100 spikes/sec

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

How does the left/right semicircular canal act?

A

acts in a push/pull fashion

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

In the semicircular canals, which side is excited /inhibited?

A

the side you turn to is excited

vice versa

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

What stucture mediates the VOR?

A

semicircular canals

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

What does the OTR, VOR and VSR mean? and do?

A

VOR: vestibulo-ocular reflex; eye adjust to movement
VSR: vestibulo-spinal reflex; righting/eq rxn, postural stability
OTR: ocular-tilt reflex: from the Utricle

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

What is the purpose of the VOR and VSR?

A

works together to help the motor system in responding, such as controlled gaze, walking, balance

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

Where is the central system’s vestibular nucleus located?

A

medulla/pons

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

What is the hallmark sign of vestibular disorder?

A

Nystagmus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is Oscillopsia?

A

eye jumps

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What are the two phases of nystagmus?

A

quick phase and slow phase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Is end range nystagmus normal?

A

yes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Why does nystagmus happen?

A

bc VOR is trying to adjust eye bc brain thinks you are still in motion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What does it mean when Nyst is present in fixation?

A

acute peripheral lesion or central lesion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Which has a greater moving Nyst, central or peripheral lesion?

A

central lesion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

what type of lesion: has unidirectional horizontal nyst?

A

peripheral lesion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

peripheral lesion move in same or diff direction?

A

same direction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

what type of lesion: quick phase beats towards the healthy ear?

A

peripheral lesion

26
Q

what type of lesion: Nyst beats the same direciton with lateral gaze, give an example

A

peripheral lesion

look R: beats R, look L, beats R

27
Q

in peripheral lesion: 1st degree of R gaze, 2nd degree of central gaze, and 3rd degree of L gaze are what?

A

all right beating

28
Q

what type of lesion: Nyst changes direction

A

central lesion

29
Q

what type of lesion: look R: beats R, Look L: beats L?

A

central lesion

30
Q

with strong central lesion what can you see?

A

downward beating

31
Q

What are the 4 peripheral vestibular disorders?

Movado

A

vestibular neuritis
Menieres disease
Acoustic neuroma
Ototoxicity

32
Q

Which peripheral disorder is bilateral?

A

Ototoxicity

33
Q

Which peripheral disorder lasts several days and may have BPPV secondarily, and its sudden vertigo onset? ALL due to viral/bacterial infection?

A

Vestibular Neuritis

34
Q

What peripheral disorder is chronic, due to increase in fluid in the inner ear, with EPISODIC vertigo that last 30 min to 2 hours with Tinnitus?

A

Meniere’s disease

35
Q

What peripheral disorder is due to rupture of the oval window with leakage into the middle ear, due to sudden pressure change?

A

Perilymphatic Fistula

36
Q

What peripheral disorder is due to a benign tumor of the Schwann cells on the CN VIII?

A

Acoustic neuroma

37
Q

What peripheral disorder is bilateral and due to aminoglycosides, results in Severe imbalance especially in the dark or uneven surfaces, with Oscillopsia present?

A

Ototoxicity

38
Q

What rehab technique is used for ototoxicity?

A

substitution of other systems

39
Q

What are 4 central vestibular disorders?

A

TBI
Migraine-related dizziness
multisystem balance disorder
Cervicogenic dizziness

40
Q

Is vestibular rehab appropriate for a migraine related vestibular?

A

yes with medication

41
Q

Who usually had multisystem balance disorder and why?

A

geriatic from 2 or more systems have been affected

42
Q

What central dysfunction is a non-specific sensation of altered orientation in space from abnormal afferent activity of the neck? has no vertigo but has ataxia, headache, and c/s pain.

A

Cervicogenic dizziness

43
Q

What is a mechanical issue leading to vertigo?

A

BPPV

44
Q

What does BPPV stand for?

A

benign paroxysmal positional vertigo

45
Q

Why does BPPV occur?

A

displacement of otoconia into the semicircular canal.

46
Q

What is the S&S of BPPV?

A

brief episodes of vertigo that last less than a minute triggered by head position change

47
Q

What are the two types of BPPV?

A

Canalithiasis

Cupulolithiasis

48
Q

What is Canalithiasis BPPV? tx?

A

the common type of BPPV,
where the Otoconia floats freely in endolymph, and treated with Epley maneuver
NYST: latency: for 5-50 sec

49
Q

What is Cupulolithiasis BPPV? tx?

A

when the Otoconia attaches to the Cupula
treated with Sermont *fast Epley
NYST: immediate: for 50 or more sec

50
Q

How is BPPV diagnosed?

A

Dix-Hallpike

51
Q

BPPV: what type of Nyst do you see in posterior canal? and involved rate?

A

upbeat and rotation nyst

75-80%

52
Q

BPPV: what type of Nyst do you see in horizontal canal? and involved rate?

A

horizontal nyst

15-20%

53
Q

BPP: what type of Nyst do you see in anterior canal? and involved rate?

A

downbeating and rotational nyst

5-10%

54
Q

What do you see with BPPV: Posterior canal in right/left?

A

Right: up and R rotation
Left: Up and L rotation

55
Q

What do you see with BPPV: Anterior canal in right/left?

A

Right: down and R rotation
Left: down and L rotation

56
Q

What do you see with BPPV: Horizontal Canalithiasis in right/left?

A

Right: geotrophic R
Left: geotrophic L

57
Q

What is the gold standard for testing unilateral peripheral disorders?

A

VNG/ENG: Caloric Test

58
Q

What is VNG Caloric Test?

A

warm/cold temp, and watch eye movement

59
Q

which vestibular has the biggest asymmetry during VNG caloric test?

A

Neuritis

60
Q

Which testing is best for bilateral vestibular and central vestibular involvement?

A

Rotational chair test

Maturity II Final (12 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions