Down beat nystagmus could be due to-a) Cerebellar lesionb) Arnold – Chiari malformationc) Optic neuritisd) Pontine lesion
Correct Answer: ab
Description: Upbeat nystagmus → lesions of central tegmentum of brain stein.
Downbeat nystagmus → Cerebellar lesions and Arnold chiari syndrome. It is due to posterior fossa disease and compression at foramen magnum level.
Category:
Ophthalmology
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