Card Set Information
Neuroopthalmology Ch 9 Nystagmus
What is oscillopsia?
sensation of movement
Nystagmus is named for the _____phase. The pathologic phase is the _____phase
What are 2 key characteristic of Congential Nystagmus?
reversal of the OKN
velocity of the slow-phase increases exponetially
Describe Congential Nystagmus
associated with normal or abnl vision
+ null point
better with convergences/worse with distance
resolves in sleep
Latent nystagmus-which eye is the fast phase toward
Fast phase toward the uncovered eye
Monocular nystagmus of childhood is associated with what brain lesion?
Spasmus nutans. ID the following
no lesion- it is benign and resolves within first decade.Rule out Monocular nystagmus of Childhood
What is gaze evoked nystagmus? Fast phase?
Location of dz? Horizontal
Inability to maintain fixed ecentric gaze
direction of gaze
-Horizontal- nucleus prepsoitus hypoglossi
-Vertical- Interstital nucleus of Cajal
Vestibular nystagmus associated with
dampens with fixation
Causes of vestibular nystagmus
Viral Vestibular neruontitis
Down Beat Nystagmus worse in which gaze
down and to the side
Cause of Downbeating nystagmus?
Cervical Medullary jnx
Upbeating nystagmus lesion location?
See-Saw associated with what type of tumor?
Periodic Alternating Nystagmus lesion location?
Ocular bobbing lesion location?
Flutter/opsoclonus lesion location?
Oculopalatal myoclonus lesion location?
inferior olivary nucleus
Oculomasticatory Myorhythmia associated with
Whipple dz, vertical saccadic palsy, nystagmus with masticatory muscles
Cerebral lesion looks which way
Brainstem lesions looks which way
toward the lesion
away from the side of the lesion