The effects of fixational eye movements on population responses in V1.
Video stream: https://vimeo.com/362367119 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...
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| Language: | English |
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MDPI AG
2019-11-01
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| Series: | Journal of Eye Movement Research |
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| Online Access: | https://bop.unibe.ch/JEMR/article/view/5966 |
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| author | Hamutal Slovin |
| author_facet | Hamutal Slovin |
| author_sort | Hamutal Slovin |
| collection | DOAJ |
| description | Video stream: https://vimeo.com/362367119
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. |
| format | Article |
| id | doaj-art-815e36adfbf34e0499f084e04091ddbb |
| institution | DOAJ |
| issn | 1995-8692 |
| language | English |
| publishDate | 2019-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Eye Movement Research |
| spelling | doaj-art-815e36adfbf34e0499f084e04091ddbb2025-08-20T03:06:57ZengMDPI AGJournal of Eye Movement Research1995-86922019-11-0112710.16910/jemr.12.7.7The effects of fixational eye movements on population responses in V1.Hamutal Slovin0Bar-Ilan University. Ramat Gan, IsraelVideo stream: https://vimeo.com/362367119 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.https://bop.unibe.ch/JEMR/article/view/5966V1fixational eye movementspopulation responsemicrosaccades |
| spellingShingle | Hamutal Slovin The effects of fixational eye movements on population responses in V1. Journal of Eye Movement Research V1 fixational eye movements population response microsaccades |
| title | The effects of fixational eye movements on population responses in V1. |
| title_full | The effects of fixational eye movements on population responses in V1. |
| title_fullStr | The effects of fixational eye movements on population responses in V1. |
| title_full_unstemmed | The effects of fixational eye movements on population responses in V1. |
| title_short | The effects of fixational eye movements on population responses in V1. |
| title_sort | effects of fixational eye movements on population responses in v1 |
| topic | V1 fixational eye movements population response microsaccades |
| url | https://bop.unibe.ch/JEMR/article/view/5966 |
| work_keys_str_mv | AT hamutalslovin theeffectsoffixationaleyemovementsonpopulationresponsesinv1 AT hamutalslovin effectsoffixationaleyemovementsonpopulationresponsesinv1 |