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The effects of fixational eye movements on population responses in V1. Keynote at the 20th European Conference on Eye Movements in Alicante, September 22, 2019

During visual fixation, the eyes make small and fast movements known as microsaccades (MSs). The effects of MSs on neural activity in the visual cortex are not well understood. Utilizing voltage-sensitive dye imaging, we imaged the spatiotemporal patterns of neuronal responses induced by MSs in earl...

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Autor principal: Slovin, Hamutal
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Bern Open Publishing 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7917487/
https://www.ncbi.nlm.nih.gov/pubmed/33828772
http://dx.doi.org/10.16910/jemr.12.7.7
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author Slovin, Hamutal
author_facet Slovin, Hamutal
author_sort Slovin, Hamutal
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description During visual fixation, the eyes make small and fast movements known as microsaccades (MSs). The effects of MSs on neural activity in the visual cortex are not well understood. Utilizing voltage-sensitive dye imaging, we imaged the spatiotemporal patterns of neuronal responses induced by MSs in early visual cortices of behaving monkeys. Our results reveal a continuous “visual instability” during fixation: while the visual stimulus moves over the retina with each MS, the neuronal activity in V1 ‘hops’ within the retinotopic map, as dictated by the MS parameters. Neuronal modulations induced by MSs are characterized by neural suppression followed by neural enhancement and increased synchronization. The suppressed activity may underlie the suppressed perception during MSs whereas the late enhancement may facilitate the processing of new incoming image information. Moreover, the instability induced by MSs applies also to neural correlates of visual perception processes such as figure-ground (FG) segregation, which appear to develop faster after fixational saccades. Video stream: https://vimeo.com/362367119
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spelling pubmed-79174872021-04-06 The effects of fixational eye movements on population responses in V1. Keynote at the 20th European Conference on Eye Movements in Alicante, September 22, 2019 Slovin, Hamutal J Eye Mov Res Research Article During visual fixation, the eyes make small and fast movements known as microsaccades (MSs). The effects of MSs on neural activity in the visual cortex are not well understood. Utilizing voltage-sensitive dye imaging, we imaged the spatiotemporal patterns of neuronal responses induced by MSs in early visual cortices of behaving monkeys. Our results reveal a continuous “visual instability” during fixation: while the visual stimulus moves over the retina with each MS, the neuronal activity in V1 ‘hops’ within the retinotopic map, as dictated by the MS parameters. Neuronal modulations induced by MSs are characterized by neural suppression followed by neural enhancement and increased synchronization. The suppressed activity may underlie the suppressed perception during MSs whereas the late enhancement may facilitate the processing of new incoming image information. Moreover, the instability induced by MSs applies also to neural correlates of visual perception processes such as figure-ground (FG) segregation, which appear to develop faster after fixational saccades. Video stream: https://vimeo.com/362367119 Bern Open Publishing 2019-11-25 /pmc/articles/PMC7917487/ /pubmed/33828772 http://dx.doi.org/10.16910/jemr.12.7.7 Text en This work is licensed under a Creative Commons Attribution 4.0 International License, ( https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use and redistribution provided that the original author and source are credited.
spellingShingle Research Article
Slovin, Hamutal
The effects of fixational eye movements on population responses in V1. Keynote at the 20th European Conference on Eye Movements in Alicante, September 22, 2019
title The effects of fixational eye movements on population responses in V1. Keynote at the 20th European Conference on Eye Movements in Alicante, September 22, 2019
title_full The effects of fixational eye movements on population responses in V1. Keynote at the 20th European Conference on Eye Movements in Alicante, September 22, 2019
title_fullStr The effects of fixational eye movements on population responses in V1. Keynote at the 20th European Conference on Eye Movements in Alicante, September 22, 2019
title_full_unstemmed The effects of fixational eye movements on population responses in V1. Keynote at the 20th European Conference on Eye Movements in Alicante, September 22, 2019
title_short The effects of fixational eye movements on population responses in V1. Keynote at the 20th European Conference on Eye Movements in Alicante, September 22, 2019
title_sort effects of fixational eye movements on population responses in v1. keynote at the 20th european conference on eye movements in alicante, september 22, 2019
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7917487/
https://www.ncbi.nlm.nih.gov/pubmed/33828772
http://dx.doi.org/10.16910/jemr.12.7.7
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