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Perceptual load affects spatial tuning of neuronal populations in human early visual cortex

Withdrawal of attention from a visual scene as a result of perceptual load modulates overall levels of activity in human visual cortex [1], but its effects on cortical spatial tuning properties are unknown. Here we show attentional load at fixation affects the spatial tuning of population receptive...

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Detalles Bibliográficos
Autores principales: de Haas, Benjamin, Schwarzkopf, D. Samuel, Anderson, Elaine J., Rees, Geraint
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Cell Press 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3928995/
https://www.ncbi.nlm.nih.gov/pubmed/24456976
http://dx.doi.org/10.1016/j.cub.2013.11.061
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author de Haas, Benjamin
Schwarzkopf, D. Samuel
Anderson, Elaine J.
Rees, Geraint
author_facet de Haas, Benjamin
Schwarzkopf, D. Samuel
Anderson, Elaine J.
Rees, Geraint
author_sort de Haas, Benjamin
collection PubMed
description Withdrawal of attention from a visual scene as a result of perceptual load modulates overall levels of activity in human visual cortex [1], but its effects on cortical spatial tuning properties are unknown. Here we show attentional load at fixation affects the spatial tuning of population receptive fields (pRFs) in early visual cortex (V1–3) using functional magnetic resonance imaging (fMRI). We found that, compared to low perceptual load, high perceptual load yielded a ‘blurrier’ representation of the visual field surrounding the attended location and a centrifugal ‘repulsion’ of pRFs. Additional data and control analyses confirmed that these effects were neither due to changes in overall activity levels nor to eye movements. These findings suggest neural ‘tunnel vision’ as a form of distractor suppression under high perceptual load.
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spelling pubmed-39289952014-03-12 Perceptual load affects spatial tuning of neuronal populations in human early visual cortex de Haas, Benjamin Schwarzkopf, D. Samuel Anderson, Elaine J. Rees, Geraint Curr Biol Correspondence Withdrawal of attention from a visual scene as a result of perceptual load modulates overall levels of activity in human visual cortex [1], but its effects on cortical spatial tuning properties are unknown. Here we show attentional load at fixation affects the spatial tuning of population receptive fields (pRFs) in early visual cortex (V1–3) using functional magnetic resonance imaging (fMRI). We found that, compared to low perceptual load, high perceptual load yielded a ‘blurrier’ representation of the visual field surrounding the attended location and a centrifugal ‘repulsion’ of pRFs. Additional data and control analyses confirmed that these effects were neither due to changes in overall activity levels nor to eye movements. These findings suggest neural ‘tunnel vision’ as a form of distractor suppression under high perceptual load. Cell Press 2014-01-20 /pmc/articles/PMC3928995/ /pubmed/24456976 http://dx.doi.org/10.1016/j.cub.2013.11.061 Text en © 2014 The Authors https://creativecommons.org/licenses/by/3.0/This is an open access article under the CC BY license (https://creativecommons.org/licenses/by/3.0/).
spellingShingle Correspondence
de Haas, Benjamin
Schwarzkopf, D. Samuel
Anderson, Elaine J.
Rees, Geraint
Perceptual load affects spatial tuning of neuronal populations in human early visual cortex
title Perceptual load affects spatial tuning of neuronal populations in human early visual cortex
title_full Perceptual load affects spatial tuning of neuronal populations in human early visual cortex
title_fullStr Perceptual load affects spatial tuning of neuronal populations in human early visual cortex
title_full_unstemmed Perceptual load affects spatial tuning of neuronal populations in human early visual cortex
title_short Perceptual load affects spatial tuning of neuronal populations in human early visual cortex
title_sort perceptual load affects spatial tuning of neuronal populations in human early visual cortex
topic Correspondence
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3928995/
https://www.ncbi.nlm.nih.gov/pubmed/24456976
http://dx.doi.org/10.1016/j.cub.2013.11.061
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