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During natural viewing, neural processing of visual targets continues throughout saccades
Relatively little is known about visual processing during free-viewing visual search in realistic dynamic environments. Free-viewing is characterized by frequent saccades. During saccades, visual processing is thought to be suppressed, yet we know that the presaccadic visual content can modulate pos...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Association for Research in Vision and Ophthalmology
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8431980/ https://www.ncbi.nlm.nih.gov/pubmed/34491271 http://dx.doi.org/10.1167/jov.21.10.7 |
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author | Stankov, Atanas D. Touryan, Jonathan Gordon, Stephen Ries, Anthony J. Ki, Jason Parra, Lucas C. |
author_facet | Stankov, Atanas D. Touryan, Jonathan Gordon, Stephen Ries, Anthony J. Ki, Jason Parra, Lucas C. |
author_sort | Stankov, Atanas D. |
collection | PubMed |
description | Relatively little is known about visual processing during free-viewing visual search in realistic dynamic environments. Free-viewing is characterized by frequent saccades. During saccades, visual processing is thought to be suppressed, yet we know that the presaccadic visual content can modulate postsaccadic processing. To better understand these processes in a realistic setting, we study here saccades and neural responses elicited by the appearance of visual targets in a realistic virtual environment. While subjects were being driven through a 3D virtual town, they were asked to discriminate between targets that appear on the road. Using a system identification approach, we separated overlapping and correlated activity evoked by visual targets, saccades, and button presses. We found that the presence of a target enhances early occipital as well as late frontocentral saccade-related responses. The earlier potential, shortly after 125 ms post-saccade onset, was enhanced for targets that appeared in the peripheral vision as compared to the central vision, suggesting that fast peripheral processing initiated before saccade onset. The later potential, at 195 ms post-saccade onset, was strongly modulated by the visibility of the target. Together these results suggest that, during natural viewing, neural processing of the presaccadic visual stimulus continues throughout the saccade, apparently unencumbered by saccadic suppression. |
format | Online Article Text |
id | pubmed-8431980 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | The Association for Research in Vision and Ophthalmology |
record_format | MEDLINE/PubMed |
spelling | pubmed-84319802021-09-24 During natural viewing, neural processing of visual targets continues throughout saccades Stankov, Atanas D. Touryan, Jonathan Gordon, Stephen Ries, Anthony J. Ki, Jason Parra, Lucas C. J Vis Article Relatively little is known about visual processing during free-viewing visual search in realistic dynamic environments. Free-viewing is characterized by frequent saccades. During saccades, visual processing is thought to be suppressed, yet we know that the presaccadic visual content can modulate postsaccadic processing. To better understand these processes in a realistic setting, we study here saccades and neural responses elicited by the appearance of visual targets in a realistic virtual environment. While subjects were being driven through a 3D virtual town, they were asked to discriminate between targets that appear on the road. Using a system identification approach, we separated overlapping and correlated activity evoked by visual targets, saccades, and button presses. We found that the presence of a target enhances early occipital as well as late frontocentral saccade-related responses. The earlier potential, shortly after 125 ms post-saccade onset, was enhanced for targets that appeared in the peripheral vision as compared to the central vision, suggesting that fast peripheral processing initiated before saccade onset. The later potential, at 195 ms post-saccade onset, was strongly modulated by the visibility of the target. Together these results suggest that, during natural viewing, neural processing of the presaccadic visual stimulus continues throughout the saccade, apparently unencumbered by saccadic suppression. The Association for Research in Vision and Ophthalmology 2021-09-07 /pmc/articles/PMC8431980/ /pubmed/34491271 http://dx.doi.org/10.1167/jov.21.10.7 Text en Copyright 2021 The Authors https://creativecommons.org/licenses/by/4.0/This work is licensed under a Creative Commons Attribution 4.0 International License. |
spellingShingle | Article Stankov, Atanas D. Touryan, Jonathan Gordon, Stephen Ries, Anthony J. Ki, Jason Parra, Lucas C. During natural viewing, neural processing of visual targets continues throughout saccades |
title | During natural viewing, neural processing of visual targets continues throughout saccades |
title_full | During natural viewing, neural processing of visual targets continues throughout saccades |
title_fullStr | During natural viewing, neural processing of visual targets continues throughout saccades |
title_full_unstemmed | During natural viewing, neural processing of visual targets continues throughout saccades |
title_short | During natural viewing, neural processing of visual targets continues throughout saccades |
title_sort | during natural viewing, neural processing of visual targets continues throughout saccades |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8431980/ https://www.ncbi.nlm.nih.gov/pubmed/34491271 http://dx.doi.org/10.1167/jov.21.10.7 |
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