Ocular Motor Signs in SCA 6

Update Item Information
Identifier Ocular_motor_signs_in_SCA_6
Title Ocular Motor Signs in SCA 6
Alternative Title Video 4.13 Gaze-evoked nystagmus and saccadic vestibulo-ocular reflex suppression (VORS) in spinocerebellar ataxia type 6 from Neuro-Ophthalmology and Neuro-Otology Textbook
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 Convergence; Abnormal VORS; OMS Cerebellar; Downbeat Nystagmus; Jerk Nystagmus; Gaze Evoked Nystagmus; Rebound Nystagmus
Description 𝗢𝗿𝗶𝗴𝗶𝗻𝗮𝗹 𝗗𝗲𝘀𝗰𝗿𝗶𝗽𝘁𝗶𝗼𝗻: This is a 45-yo-man who was recently diagnosed with SCA 6. There was no clear spontaneous downbeat nystagmus (DBN) in primary gaze, although DBN could clearly be provoked by convergence. Other ocular motor features included choppy pursuit and VOR suppression horizontally and vertically, in addition to an alternating hypertropia (skew deviation), gaze-evoked and rebound nystagmus. Saccades were normal. His VOR was completely normal. These are all typical ocular motor features of a flocculus/paraflocculus syndrome. 𝗡𝗲𝘂𝗿𝗼-𝗼𝗽𝗵𝘁𝗵𝗮𝗹𝗺𝗼𝗹𝗼𝗴𝘆 𝗮𝗻𝗱 𝗡𝗲𝘂𝗿𝗼-𝗼𝘁𝗼𝗹𝗼𝗴𝘆 𝗧𝗲𝘅𝘁𝗯𝗼𝗼𝗸 𝗟𝗲𝗴𝗲𝗻𝗱: On exam, there was no clear spontaneous downbeat nystagmus (DBN) in primary gaze, although DBN could clearly be provoked by convergence. Other ocular motor features included saccadic pursuit and VORS (suggestive of a normal VOR - i.e., there was a VOR to suppress, but given the pursuit defcit, VORS was saccadic) horizontally and vertically, in addition to an alternating skew deviation (right hypertropia in right gaze and left hypertropia in left gaze), gaze-evoked and rebound nystagmus. Saccades were normal. Head impulse test was normal. These are all typical ocular motor features of a focculus/parafocculus syndrome. https:// collections.lib.utah.edu/ark:/87278/s6vx45m7
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
Rights Management Copyright 2016. For further information regarding the rights to this collection, please visit: https://NOVEL.utah.edu/about/copyright
ARK ark:/87278/s6vx45m7
Setname ehsl_novel_gold
ID 1248765
Reference URL https://collections.lib.utah.edu/ark:/87278/s6vx45m7
Back to Search Results