Parallel Advantage: Further Evidence for Bottom-up Saliency Computation by Human Primary Visual Cortex

Finding a target among uniformly oriented non-targets is typically faster when this target is perpendicular, rather than parallel, to the non-targets. The V1 Saliency Hypothesis (V1SH), that neurons in the primary visual cortex (V1) signal saliency for exogenous attentional attraction, predicts exac...

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Detalles Bibliográficos
Autor principal: Zhaoping, Li
Formato: Online Artículo Texto
Lenguaje:English
Publicado: SAGE Publications 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8938995/
https://www.ncbi.nlm.nih.gov/pubmed/35025626
http://dx.doi.org/10.1177/03010066211062583
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author Zhaoping, Li
author_facet Zhaoping, Li
author_sort Zhaoping, Li
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description Finding a target among uniformly oriented non-targets is typically faster when this target is perpendicular, rather than parallel, to the non-targets. The V1 Saliency Hypothesis (V1SH), that neurons in the primary visual cortex (V1) signal saliency for exogenous attentional attraction, predicts exactly the opposite in a special case: each target or non-target comprises two equally sized disks displaced from each other by 1.2 disk diameters center-to-center along a line defining its orientation. A target has two white or two black disks. Each non-target has one white disk and one black disk, and thus, unlike the target, activates V1 neurons less when its orientation is parallel rather than perpendicular to the neurons’ preferred orientations. When the target is parallel, rather than perpendicular, to the uniformly oriented non-targets, the target’s evoked V1 response escapes V1’s iso-orientation surround suppression, making the target more salient. I present behavioral observations confirming this prediction.
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spelling pubmed-89389952022-03-23 Parallel Advantage: Further Evidence for Bottom-up Saliency Computation by Human Primary Visual Cortex Zhaoping, Li Perception Short Reports Finding a target among uniformly oriented non-targets is typically faster when this target is perpendicular, rather than parallel, to the non-targets. The V1 Saliency Hypothesis (V1SH), that neurons in the primary visual cortex (V1) signal saliency for exogenous attentional attraction, predicts exactly the opposite in a special case: each target or non-target comprises two equally sized disks displaced from each other by 1.2 disk diameters center-to-center along a line defining its orientation. A target has two white or two black disks. Each non-target has one white disk and one black disk, and thus, unlike the target, activates V1 neurons less when its orientation is parallel rather than perpendicular to the neurons’ preferred orientations. When the target is parallel, rather than perpendicular, to the uniformly oriented non-targets, the target’s evoked V1 response escapes V1’s iso-orientation surround suppression, making the target more salient. I present behavioral observations confirming this prediction. SAGE Publications 2022-01-13 2022-01 /pmc/articles/PMC8938995/ /pubmed/35025626 http://dx.doi.org/10.1177/03010066211062583 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/This article is distributed under the terms of the Creative Commons Attribution 4.0 License (https://creativecommons.org/licenses/by/4.0/) which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access page (https://us.sagepub.com/en-us/nam/open-access-at-sage).
spellingShingle Short Reports
Zhaoping, Li
Parallel Advantage: Further Evidence for Bottom-up Saliency Computation by Human Primary Visual Cortex
title Parallel Advantage: Further Evidence for Bottom-up Saliency Computation by Human Primary Visual Cortex
title_full Parallel Advantage: Further Evidence for Bottom-up Saliency Computation by Human Primary Visual Cortex
title_fullStr Parallel Advantage: Further Evidence for Bottom-up Saliency Computation by Human Primary Visual Cortex
title_full_unstemmed Parallel Advantage: Further Evidence for Bottom-up Saliency Computation by Human Primary Visual Cortex
title_short Parallel Advantage: Further Evidence for Bottom-up Saliency Computation by Human Primary Visual Cortex
title_sort parallel advantage: further evidence for bottom-up saliency computation by human primary visual cortex
topic Short Reports
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8938995/
https://www.ncbi.nlm.nih.gov/pubmed/35025626
http://dx.doi.org/10.1177/03010066211062583
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