Five Common Ocular Motor Signs in Cerebellar Disorders - Saccadic Hypermetria, Saccadic Pursuit & VOR Suppression, Gaze-evoked & Rebound Nystagmus

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Identifier Cerebellar_Ataxia_and_Common_Signs
Title Five Common Ocular Motor Signs in Cerebellar Disorders - Saccadic Hypermetria, Saccadic Pursuit & VOR Suppression, Gaze-evoked & Rebound Nystagmus
Creator Daniel R. Gold, DO
Affiliation (DRG) Departments of Neurology, Ophthalmology, Neurosurgery, Otolaryngology - Head & Neck Surgery, Emergency Medicine, and Medicine, The Johns Hopkins School of Medicine, Baltimore, Maryland
Subject Abnormal Saccades; Abnormal Pursuit; Abnormal Vestibulo-ocular Reflex (VOR) Suppression; Jerk Nystagmus; Gaze-evoked Nystagmus; Rebound Nystagmus; Cerebellar Oms
Description (1) Saccadic hypermetria - an overshoot of the visual target (2) Saccadic smooth pursuit - due to impaired pursuit and low gain, saccades are needed to keep up with the visual target. This gives it a ‘choppy' appearance. (3) Saccadic vestibulo-ocular reflex (VOR) suppression - another manifestation of pursuit impairment, assuming that there is a VOR to suppress - e.g., pursuit will be saccadic but VOR suppression can be normal if there is bilateral vestibular loss and cerebellar disease (cerebellar ataxia, neuropathy, vestibular areflexia syndrome, CANVAS) (4) Gaze-evoked nystagmus - right-beating nystagmus (RBN) in right gaze, left-beating nystagmus (LBN) in left gaze, often seen with vertical gaze-evoked nystagmus as well (5) Rebound nystagmus - RBN in right gaze that transitions to LBN when the patient looks from right to center; LBN to RBN when going from left gaze to center
Date 2022-09
Language eng
Format video/mp4
Type Image/MovingImage
Collection Neuro-Ophthalmology Virtual Education Library: Dan Gold Collection: https://novel.utah.edu/Gold/
Publisher North American Neuro-Ophthalmology Society
Holding Institution Spencer S. Eccles Health Sciences Library, University of Utah
Rights Management Copyright 2016. For further information regarding the rights to this collection, please visit: https://NOVEL.utah.edu/about/copyright
ARK ark:/87278/s60v6b7c
File Name Cerebellar_Ataxia_and_Common_Signs.mp4
Setname ehsl_novel_gold
ID 2060048
Reference URL https://collections.lib.utah.edu/ark:/87278/s60v6b7c
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