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Journal of Neuro-Ophthalmology:
doi: 10.1097/WNO.0000000000000098
Clinical Observation

Positional Suppression of Periodic Alternating Nystagmus

Chung, Seok Jong MD; Park, Seong-Ho MD, PhD; Kim, Ji-Soo MD, PhD; Oh, Sea Won BSc; Kim, Hyo Jung MSc; Park, Jae Han MD; Huh, Young Eun MD

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Abstract

A 43-year-old man with a high-grade glioma involving the cerebellar nodulus showed a near-complete suppression of periodic alternating nystagmus (PAN) in the lateral decubitus position to either side. This positional modulation of PAN is consistent with suppression of the velocity storage mechanism by head position changes (tilt dumping) and is supportive of the role of the velocity storage mechanism in generating PAN.

Copyright © 2014 by North American Neuro-Ophthalmology Society

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