Ocular Motility Disorders Due to Cerebral and Basal Ganglia Disease (slides)

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Identifier 20160303_nanos_ocularmotility1_01-2
Title Ocular Motility Disorders Due to Cerebral and Basal Ganglia Disease (slides)
Creator Jason J S Barton, MD PhD FRCP(C), Professor, Medicine (Neurology), Ophthalmology and Visual Sciences, Psychology, The University of British Columbia
Subject Saccade, Pursuit, Hemianopia, Hemineglect, Agnosia
Description Where we look determines what we see. Because human vision varies greatly with retinotopic location, with high spatial resolution limited to the fovea, humans have evolved a sophisticated ocular motor system, much of it aimed at stabilizing vision on objects of interest, despite the fact that we are mobile creatures and live in dynamic environments. Thus fixation serves to hold our gaze on a stationary object, while the vestibular and optokinetic systems work together to stabilize that gaze while our bodies or heads are in motion. If the object is moving, the smooth pursuit system will use information about the object's trajectory to keep gaze on the object. Any failure of these systems to keep gaze directed at the object will create a position error signal that will trigger a corrective saccade. Finally saccades also have the function of shifting gaze to new objects of interest, following which all the systems mentioned will act to stabilize gaze on the new object.
Contributor Primary Jason J. S. Barton, MD, PhD, FRCPC
Contributor Secondary Jason J. S. Barton, MD, PhD, FRCPC
Publisher Spencer S. Eccles Health Sciences Library, University of Utah
Date 2016-03-03
Type Text
Format application/pdf
Format Creation application/pdf
Collection Neuro-ophthalmology Virtual Education Library: NOVEL http://NOVEL.utah.edu
Language eng
ARK ark:/87278/s6sn3gx7
Setname ehsl_novel_nam
Date Created 2016-08-03
Date Modified 2017-10-04
ID 185348
Reference URL https://collections.lib.utah.edu/ark:/87278/s6sn3gx7
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