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The Simon Effect Based on Allocentric and Egocentric Reference Frame: Common and Specific Neural Correlates

An object’s location can be represented either relative to an observer’s body effectors (egocentric reference frame) or relative to another external object (allocentric reference frame). In non-spatial tasks, an object’s task-irrelevant egocentric position conflicts with the side of a task-relevant...

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Autores principales: Li, Hui, Liu, Nan, Li, You, Weidner, Ralph, Fink, Gereon R., Chen, Qi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6760495/
https://www.ncbi.nlm.nih.gov/pubmed/31551429
http://dx.doi.org/10.1038/s41598-019-49990-5
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author Li, Hui
Liu, Nan
Li, You
Weidner, Ralph
Fink, Gereon R.
Chen, Qi
author_facet Li, Hui
Liu, Nan
Li, You
Weidner, Ralph
Fink, Gereon R.
Chen, Qi
author_sort Li, Hui
collection PubMed
description An object’s location can be represented either relative to an observer’s body effectors (egocentric reference frame) or relative to another external object (allocentric reference frame). In non-spatial tasks, an object’s task-irrelevant egocentric position conflicts with the side of a task-relevant manual response, which defines the classical Simon effect. Growing evidence suggests that the Simon effect occurs not only based on conflicting positions within the egocentric but also within the allocentric reference frame. Although neural mechanisms underlying the egocentric Simon effect have been extensively researched, neural mechanisms underlying the allocentric Simon effect and their potential interaction with those underlying its egocentric variant remain to be explored. In this fMRI study, spatial congruency between the task-irrelevant egocentric and allocentric target positions and the task-relevant response hand was orthogonally manipulated. Behaviorally, a significant Simon effect was observed for both reference frames. Neurally, three sub-regions in the frontoparietal network were involved in different aspects of the Simon effect, depending on the source of the task-irrelevant object locations. The right precentral gyrus, extending to the right SMA, was generally activated by Simon conflicts, irrespective of the spatial reference frame involved, and showed no additive activity to Simon conflicts. In contrast, the right postcentral gyrus was specifically involved in Simon conflicts induced by task-irrelevant allocentric, rather than egocentric, representations. Furthermore, a right lateral frontoparietal network showed increased neural activity whenever the egocentric and allocentric target locations were incongruent, indicating its functional role as a mismatch detector that monitors the discrepancy concerning allocentric and egocentric object locations.
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spelling pubmed-67604952019-11-12 The Simon Effect Based on Allocentric and Egocentric Reference Frame: Common and Specific Neural Correlates Li, Hui Liu, Nan Li, You Weidner, Ralph Fink, Gereon R. Chen, Qi Sci Rep Article An object’s location can be represented either relative to an observer’s body effectors (egocentric reference frame) or relative to another external object (allocentric reference frame). In non-spatial tasks, an object’s task-irrelevant egocentric position conflicts with the side of a task-relevant manual response, which defines the classical Simon effect. Growing evidence suggests that the Simon effect occurs not only based on conflicting positions within the egocentric but also within the allocentric reference frame. Although neural mechanisms underlying the egocentric Simon effect have been extensively researched, neural mechanisms underlying the allocentric Simon effect and their potential interaction with those underlying its egocentric variant remain to be explored. In this fMRI study, spatial congruency between the task-irrelevant egocentric and allocentric target positions and the task-relevant response hand was orthogonally manipulated. Behaviorally, a significant Simon effect was observed for both reference frames. Neurally, three sub-regions in the frontoparietal network were involved in different aspects of the Simon effect, depending on the source of the task-irrelevant object locations. The right precentral gyrus, extending to the right SMA, was generally activated by Simon conflicts, irrespective of the spatial reference frame involved, and showed no additive activity to Simon conflicts. In contrast, the right postcentral gyrus was specifically involved in Simon conflicts induced by task-irrelevant allocentric, rather than egocentric, representations. Furthermore, a right lateral frontoparietal network showed increased neural activity whenever the egocentric and allocentric target locations were incongruent, indicating its functional role as a mismatch detector that monitors the discrepancy concerning allocentric and egocentric object locations. Nature Publishing Group UK 2019-09-24 /pmc/articles/PMC6760495/ /pubmed/31551429 http://dx.doi.org/10.1038/s41598-019-49990-5 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Li, Hui
Liu, Nan
Li, You
Weidner, Ralph
Fink, Gereon R.
Chen, Qi
The Simon Effect Based on Allocentric and Egocentric Reference Frame: Common and Specific Neural Correlates
title The Simon Effect Based on Allocentric and Egocentric Reference Frame: Common and Specific Neural Correlates
title_full The Simon Effect Based on Allocentric and Egocentric Reference Frame: Common and Specific Neural Correlates
title_fullStr The Simon Effect Based on Allocentric and Egocentric Reference Frame: Common and Specific Neural Correlates
title_full_unstemmed The Simon Effect Based on Allocentric and Egocentric Reference Frame: Common and Specific Neural Correlates
title_short The Simon Effect Based on Allocentric and Egocentric Reference Frame: Common and Specific Neural Correlates
title_sort simon effect based on allocentric and egocentric reference frame: common and specific neural correlates
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6760495/
https://www.ncbi.nlm.nih.gov/pubmed/31551429
http://dx.doi.org/10.1038/s41598-019-49990-5
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