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DTSTART:20190331T030000
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DTSTART:20191027T020000
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DTSTAMP:20260404T020006Z
UID:5d4ac51ecf40c021176016@ist.ac.at
DTSTART:20190829T110000
DTEND:20190829T120000
DESCRIPTION:Speaker: Saad Idrees\nhosted by Sandra Siegert\nAbstract: Visua
 l sensitivity is strongly impaired around the time of rapid eye movements 
 such as saccades. This robust perceptual phenomenon\, called saccadic supp
 ression\, is frequently attributed to suppressive signals that are directl
 y derived from eye movement commands. Using a combination of human behavio
 r and animal retina electrophysiology\, we show instead that visual-only m
 echanisms\, triggered by scene changes across the retina\, can account for
  all perceptual properties of saccadic suppression we investigated\, witho
 ut the need to invoke explicit eye movement based suppression commands. Su
 ch mechanisms start at the very first stage of visual processing in the br
 ain\, the retina. In the retina\, we found that retinal saccadic suppressi
 on occurred robustly across many different ganglion cell types and is a re
 sult of specific retinal-circuit image processing mediated by multiple loc
 al and global mechanisms. Additionally\, we show that suppression originat
 ing in the retina outlasts perceptual suppression during saccades\, sugges
 ting that eye-movement related signals might act to instead shorten the su
 ppression originating in the retina. We have therefore identified one of t
 he first neural loci of saccadic suppression and described the underlying 
 mechanisms.
LOCATION:Mondi Seminar Room 3\, Central Building\, ISTA
ORGANIZER:rsix@ist.ac.at
SUMMARY:Saad Idrees: Saccadic suppression by way of retinal-circuit image p
 rocessing
URL:https://talks-calendar.ista.ac.at/events/2051
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