(DRG) Departments of Neurology, Ophthalmology, Neurosurgery, Otolaryngology - Head & Neck Surgery, Emergency Medicine, and Medicine, The Johns Hopkins School of Medicine, Baltimore, Maryland
Subject
Pendular Nystagmus
Description
Three patients are presented here, each with poor vision (counting fingers or worse) related to retinitis pigmentosa in one patient (Usher's syndrome) and optic neuropathy in two patients, each of whom developed pendular nystagmus after vision loss developed. Visually mediated movements normally prevent the eyes from drifting away from a target, and afferent inputs are needed to calibrate eye movements. Especially in the two optic neuropathy patients who had neurologic involvement, multiple possible mechanisms for the nystagmus exist, 1) vision loss resulting in delayed response time for visual processing, and 2) the possibility of an unstable neural integrator from brainstem involvement.
Date
2017
Language
eng
Format
video/mp4
Type
Image/MovingImage
Collection
Neuro-Ophthalmology Virtual Education Library: Dan Gold Neuro-Ophthalmology Collection: https://novel.utah.edu/Gold/
Publisher
North American Neuro-Ophthalmology Society
Holding Institution
Spencer S. Eccles Health Sciences Library, University of Utah, 10 N 1900 E SLC, UT 84112-5890