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Fast and nonuniform dynamics of perisaccadic vision in the central fovea
Humans use rapid eye movements (saccades) to inspect stimuli with the foveola, the region of the retina where receptors are most densely packed. It is well established that visual sensitivity is generally attenuated during these movements, a phenomenon known as saccadic suppression. This effect is c...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
National Academy of Sciences
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8449317/ https://www.ncbi.nlm.nih.gov/pubmed/34497123 http://dx.doi.org/10.1073/pnas.2101259118 |
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author | Intoy, Janis Mostofi, Naghmeh Rucci, Michele |
author_facet | Intoy, Janis Mostofi, Naghmeh Rucci, Michele |
author_sort | Intoy, Janis |
collection | PubMed |
description | Humans use rapid eye movements (saccades) to inspect stimuli with the foveola, the region of the retina where receptors are most densely packed. It is well established that visual sensitivity is generally attenuated during these movements, a phenomenon known as saccadic suppression. This effect is commonly studied with large, often peripheral, stimuli presented during instructed saccades. However, little is known about how saccades modulate the foveola and how the resulting dynamics unfold during natural visual exploration. Here we measured the foveal dynamics of saccadic suppression in a naturalistic high-acuity task, a task designed after primates’ social grooming, which—like most explorations of fine patterns—primarily elicits minute saccades (microsaccades). Leveraging on recent advances in gaze-contingent display control, we were able to systematically map the perisaccadic time course of sensitivity across the foveola. We show that contrast sensitivity is not uniform across this region and that both the extent and dynamics of saccadic suppression vary within the foveola. Suppression is stronger and faster in the most central portion, where sensitivity is generally higher and selectively rebounds at the onset of a new fixation. These results shed light on the modulations experienced by foveal vision during the saccade-fixation cycle and explain some of the benefits of microsaccades. |
format | Online Article Text |
id | pubmed-8449317 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | National Academy of Sciences |
record_format | MEDLINE/PubMed |
spelling | pubmed-84493172021-10-04 Fast and nonuniform dynamics of perisaccadic vision in the central fovea Intoy, Janis Mostofi, Naghmeh Rucci, Michele Proc Natl Acad Sci U S A Biological Sciences Humans use rapid eye movements (saccades) to inspect stimuli with the foveola, the region of the retina where receptors are most densely packed. It is well established that visual sensitivity is generally attenuated during these movements, a phenomenon known as saccadic suppression. This effect is commonly studied with large, often peripheral, stimuli presented during instructed saccades. However, little is known about how saccades modulate the foveola and how the resulting dynamics unfold during natural visual exploration. Here we measured the foveal dynamics of saccadic suppression in a naturalistic high-acuity task, a task designed after primates’ social grooming, which—like most explorations of fine patterns—primarily elicits minute saccades (microsaccades). Leveraging on recent advances in gaze-contingent display control, we were able to systematically map the perisaccadic time course of sensitivity across the foveola. We show that contrast sensitivity is not uniform across this region and that both the extent and dynamics of saccadic suppression vary within the foveola. Suppression is stronger and faster in the most central portion, where sensitivity is generally higher and selectively rebounds at the onset of a new fixation. These results shed light on the modulations experienced by foveal vision during the saccade-fixation cycle and explain some of the benefits of microsaccades. National Academy of Sciences 2021-09-14 2021-09-08 /pmc/articles/PMC8449317/ /pubmed/34497123 http://dx.doi.org/10.1073/pnas.2101259118 Text en Copyright © 2021 the Author(s). Published by PNAS. https://creativecommons.org/licenses/by/4.0/This open access article is distributed under Creative Commons Attribution License 4.0 (CC BY) (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Biological Sciences Intoy, Janis Mostofi, Naghmeh Rucci, Michele Fast and nonuniform dynamics of perisaccadic vision in the central fovea |
title | Fast and nonuniform dynamics of perisaccadic vision in the central fovea |
title_full | Fast and nonuniform dynamics of perisaccadic vision in the central fovea |
title_fullStr | Fast and nonuniform dynamics of perisaccadic vision in the central fovea |
title_full_unstemmed | Fast and nonuniform dynamics of perisaccadic vision in the central fovea |
title_short | Fast and nonuniform dynamics of perisaccadic vision in the central fovea |
title_sort | fast and nonuniform dynamics of perisaccadic vision in the central fovea |
topic | Biological Sciences |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8449317/ https://www.ncbi.nlm.nih.gov/pubmed/34497123 http://dx.doi.org/10.1073/pnas.2101259118 |
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