nystagmus

Question 1

whats pendular nystagmus

Answer 1

both phases are slow

Question 2

what are saccadic intrusions?

Answer 2

both phases are fast

Question 3

whats dissociated nystagmus?

Answer 3

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

Question 4

whats disconjugate nystagmus?

Answer 4

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

Question 5

when does congenital nystagmus appear?

Answer 5

first few months of life

Question 6

when conditions are seen w congenital nystagmus

Answer 6

lebers congenital amaurosis
albinism
aniridia

Question 7

what excentuates the nystagmus in congenital nystagmus?

Answer 7

distant fixation

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

Question 8

ddx of square wave jerks

Answer 8

parkinsons

PSP

Question 9

see saw nystagmus localizes to…

Answer 9

sella

Question 10

upbeat nystagmus localizes to

Answer 10

medulla

Question 11

downbeat nystagmus localizes to

Answer 11

cervico-medulary jxn

Question 12

convergenct-retraction nystagmus localizes to…

Answer 12

dorsal midbrain

Question 13

opsoclonus localizes to…and can be associated with….

Answer 13

pons

ass w neuroblastoma or scc lung in adults

Question 14

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

Answer 14

destructive lesion of pons

poor neurologic prognosis

Question 15

how do you work up monocular nystagmus in a kid?

Answer 15

image! possible ON glioma

Question 16

whats another name for opsoclonus?

Answer 16

saccadomania

Question 17

where does rebound nystagmus localize to?

Answer 17

the cerebellum

Question 18

gaze evoked nystagmus locatizes where?

Answer 18

the cerebellum