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Flashcards in nystagmus Deck (18):
1

whats pendular nystagmus

both phases are slow

2

what are saccadic intrusions?

both phases are fast

3

whats dissociated nystagmus?

when the amplitude of the osscilations are different in the two eyes

4

whats disconjugate nystagmus?

when the direction of the nystagmus is different in the 2 eyes

5

when does congenital nystagmus appear?

first few months of life

6

when conditions are seen w congenital nystagmus

lebers congenital amaurosis
albinism
aniridia

7

what excentuates the nystagmus in congenital nystagmus?

distant fixation
also they do not have oscillopsia (sensation that the world is moving)

8

ddx of square wave jerks

parkinsons
PSP

9

see saw nystagmus localizes to...

sella

10

upbeat nystagmus localizes to

medulla

11

downbeat nystagmus localizes to

cervico-medulary jxn

12

convergenct-retraction nystagmus localizes to...

dorsal midbrain

13

opsoclonus localizes to...and can be associated with....

pons
ass w neuroblastoma or scc lung in adults

14

ocular bobbing- downward dropping of eyes then slowly float back up localized to .... prognosis is...

destructive lesion of pons
poor neurologic prognosis

15

how do you work up monocular nystagmus in a kid?

image! possible ON glioma

16

whats another name for opsoclonus?

saccadomania

17

where does rebound nystagmus localize to?

the cerebellum

18

gaze evoked nystagmus locatizes where?

the cerebellum