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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2021-01-01
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Online Access: | https://doi.org/10.1038/s41598-020-79457-x |
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doaj-8a4a002e4a2a4df494bdd7faae89fb0e2021-01-17T12:45:32ZengNature Publishing GroupScientific Reports2045-23222021-01-0111111810.1038/s41598-020-79457-xSource dipole analysis reveals a new brain response to visual symmetryJohn Tyson-Carr0Marco Bertamini1Giulia Rampone2Alexis Makin3Department of Psychological Sciences, University of LiverpoolDepartment of Psychological Sciences, University of LiverpoolDepartment of Psychological Sciences, University of LiverpoolDepartment of Psychological Sciences, University of LiverpoolAbstract 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.https://doi.org/10.1038/s41598-020-79457-x |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
John Tyson-Carr Marco Bertamini Giulia Rampone Alexis Makin |
spellingShingle |
John Tyson-Carr Marco Bertamini Giulia Rampone Alexis Makin Source dipole analysis reveals a new brain response to visual symmetry Scientific Reports |
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 Publishing Group |
series |
Scientific Reports |
issn |
2045-2322 |
publishDate |
2021-01-01 |
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. |
url |
https://doi.org/10.1038/s41598-020-79457-x |
work_keys_str_mv |
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