Vestibulo-ocular Exam Flashcards
Nystagmus with central dysfunction:
Vertical
Unchanged with fixation
No fatigability
No latency
Nystagmus with peripheral dysfunction
Mixed torsional
Dampens with fixation
fatigues
Latency post-maneuver
Causes of vertigo that lasts seconds
BPPV
TIA
Causes of vertigo that lasts minutes
TIA
Migraine
T/F: hearing loss is common with central dizziness?
False, it is common with peripheral
T/F: Oscillopsia is commonly severe with central dizziness
True
What the heck is oscillopsia?
when the visual field oscillates or appears blurry
Causes of dizziness that lasts hours
Meniere’s
Migraine
Causes of dizziness that last days
Vestibular neuritis
Trauma
Labyrinthine infarct
Nystagmus is named by which phase?
the fast phase
If nystagmus changes directions from spontaneous to gaze holding, what is this indicative of?
CENTRAL DYSFUNCTION!!!!@
With spontaneous nystagmus, a L beat indicates?
R peripheral hypofunction
With spontaneous nystagmus, a R beat indicates
L peripheral hypofunction
An abnormal smooth pursuit indicates…?
central pathology
What is end point nystagmus indicative of at full range on smooth pursuit?
Nothing, this is normal
younger<older
An abnormal convergence test indicates…?
central pathology
What PMH may lack convergence?
cataract sx
How do you test saccades?
Move vision quickly between 2 targets.
Test horizontal and vertical
Look for correction, over/undershooting
What does abnormal saccades indicate?
central pathology
What is the Sharp Purser test for?
C2 stability
How do you clear the C-spine?
AROM with over pressure
What difference on the DVA test from static indicates a pathology?
> 2 lines difference
How should the head be positioned for Dynamic Visual Acuity
Tilted 20-30 degrees forward
How fast should the head be moved in DVA testing?
2 complete movements per second
What does an abnormal DVA indicate?
Either peripheral or central dysfunction
What does an abnormal VOR cancellation indicate?
Central pathology
Head thrust test is named by…
the direction of head movement
Abnormal head thrust test indicates?
peripheral hypofunction
+ R head thrust test indicates?
R hypofunction
+ L head thrust test indicates?
L hypofunction
How is the head shaking test performed?
Close pt eyes, shake head 20x side to side.
Have pt open eyes.
Observe
Vertical nystagmus with head shaking test indicates:
Central pathology
Horizontal nystagmus with head shaking test indicates:
Peripheral hypofunction (contralateral)
L nystagmus with head shaking test indicates?
R hypofunction
R nystagmus with head shaking test indicates?
L hypofunction
Halpike Dix test is for?
BPPV
What differentiates canalithiasis from cupulolithiasis when performing HPD?
length of nystagmus
