Source dipole analysis reveals a new brain response to visual symmetry

Abstract Visual regularity activates a network of brain regions in the extrastriate cortex. Previous EEG studies have found that this response scales parametrically with proportion of symmetry in symmetry + noise displays. The parametric symmetry response happens in many tasks, but it is enhanced du...

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Autores principales:	John Tyson-Carr, Marco Bertamini, Giulia Rampone, Alexis Makin
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8a4a002e4a2a4df494bdd7faae89fb0e
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id	oai:doaj.org-article:8a4a002e4a2a4df494bdd7faae89fb0e
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spelling	oai:doaj.org-article:8a4a002e4a2a4df494bdd7faae89fb0e2021-12-02T14:12:10ZSource dipole analysis reveals a new brain response to visual symmetry10.1038/s41598-020-79457-x2045-2322https://doaj.org/article/8a4a002e4a2a4df494bdd7faae89fb0e2021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-79457-xhttps://doaj.org/toc/2045-2322Abstract Visual regularity activates a network of brain regions in the extrastriate cortex. Previous EEG studies have found that this response scales parametrically with proportion of symmetry in symmetry + noise displays. The parametric symmetry response happens in many tasks, but it is enhanced during active regularity discrimination. However, the origins and time course of this selective enhancement are unclear. Here we answered remaining questions with new source dipole analysis. As assumed, the parametric symmetry response found at the sensor level was generated by a pair of dipoles in the left and right extrastriate cortex. This bilateral activity was itself enhanced during regularity discrimination. However, we identified a third, and later, symmetry response in the posterior cingulate during regularity discrimination. Unlike the extrastriate response, this previously unknown activation only indexes strong, task relevant regularity signals. This clarifies the neural circuits which mediate the perceptual and cognitive aspects of symmetry discrimination.John Tyson-CarrMarco BertaminiGiulia RamponeAlexis MakinNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-18 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q John Tyson-Carr Marco Bertamini Giulia Rampone Alexis Makin Source dipole analysis reveals a new brain response to visual symmetry
description	Abstract Visual regularity activates a network of brain regions in the extrastriate cortex. Previous EEG studies have found that this response scales parametrically with proportion of symmetry in symmetry + noise displays. The parametric symmetry response happens in many tasks, but it is enhanced during active regularity discrimination. However, the origins and time course of this selective enhancement are unclear. Here we answered remaining questions with new source dipole analysis. As assumed, the parametric symmetry response found at the sensor level was generated by a pair of dipoles in the left and right extrastriate cortex. This bilateral activity was itself enhanced during regularity discrimination. However, we identified a third, and later, symmetry response in the posterior cingulate during regularity discrimination. Unlike the extrastriate response, this previously unknown activation only indexes strong, task relevant regularity signals. This clarifies the neural circuits which mediate the perceptual and cognitive aspects of symmetry discrimination.
format	article
author	John Tyson-Carr Marco Bertamini Giulia Rampone Alexis Makin
author_facet	John Tyson-Carr Marco Bertamini Giulia Rampone Alexis Makin
author_sort	John Tyson-Carr
title	Source dipole analysis reveals a new brain response to visual symmetry
title_short	Source dipole analysis reveals a new brain response to visual symmetry
title_full	Source dipole analysis reveals a new brain response to visual symmetry
title_fullStr	Source dipole analysis reveals a new brain response to visual symmetry
title_full_unstemmed	Source dipole analysis reveals a new brain response to visual symmetry
title_sort	source dipole analysis reveals a new brain response to visual symmetry
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/8a4a002e4a2a4df494bdd7faae89fb0e
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Source dipole analysis reveals a new brain response to visual symmetry

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