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A tRNS investigation of the sensory representation of time

The understanding of the mechanisms underlying the representation of temporal intervals in the range of milliseconds/seconds remains a complex issue. Different brain areas have been identified as critical in temporal processing. The activation of specific areas is depending on temporal range involve...

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Autores principales: Mioni, G., Grondin, S., Mapelli, D., Stablum, F.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6037735/
https://www.ncbi.nlm.nih.gov/pubmed/29985432
http://dx.doi.org/10.1038/s41598-018-28673-7
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author Mioni, G.
Grondin, S.
Mapelli, D.
Stablum, F.
author_facet Mioni, G.
Grondin, S.
Mapelli, D.
Stablum, F.
author_sort Mioni, G.
collection PubMed
description The understanding of the mechanisms underlying the representation of temporal intervals in the range of milliseconds/seconds remains a complex issue. Different brain areas have been identified as critical in temporal processing. The activation of specific areas is depending on temporal range involved in the tasks and on the modalities used for marking time. Here, for the first time, transcranial random noise stimulation (tRNS) was applied over the right posterior parietal (P4) and right frontal (F4) cortex to investigate their role in intra- and intermodal temporal processing involving brief temporal intervals (<1 sec). Eighty University students performed a time bisection task involving standard durations lasting 300 ms (short) and 900 ms (long). Each empty interval to be judged was marked by two successive brief visual (V) or auditory (A) signals defining four conditions: VV, VA, AV or AA. Participants were assigned to one of these four conditions. Half of the participants received tRNS over P4 and half over F4. No effect of stimulation was observed on temporal variability (Weber ratio). However, participants that were stimulated over P4 overestimated temporal intervals in the random condition compared to the sham condition. In addition to showing an effect of tRNS on perceived duration rather than on temporal variability, the results of the present study confirm that the right posterior parietal cortex is involved in the processing of time intervals and extend this finding to several sensory modality conditions.
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spelling pubmed-60377352018-07-12 A tRNS investigation of the sensory representation of time Mioni, G. Grondin, S. Mapelli, D. Stablum, F. Sci Rep Article The understanding of the mechanisms underlying the representation of temporal intervals in the range of milliseconds/seconds remains a complex issue. Different brain areas have been identified as critical in temporal processing. The activation of specific areas is depending on temporal range involved in the tasks and on the modalities used for marking time. Here, for the first time, transcranial random noise stimulation (tRNS) was applied over the right posterior parietal (P4) and right frontal (F4) cortex to investigate their role in intra- and intermodal temporal processing involving brief temporal intervals (<1 sec). Eighty University students performed a time bisection task involving standard durations lasting 300 ms (short) and 900 ms (long). Each empty interval to be judged was marked by two successive brief visual (V) or auditory (A) signals defining four conditions: VV, VA, AV or AA. Participants were assigned to one of these four conditions. Half of the participants received tRNS over P4 and half over F4. No effect of stimulation was observed on temporal variability (Weber ratio). However, participants that were stimulated over P4 overestimated temporal intervals in the random condition compared to the sham condition. In addition to showing an effect of tRNS on perceived duration rather than on temporal variability, the results of the present study confirm that the right posterior parietal cortex is involved in the processing of time intervals and extend this finding to several sensory modality conditions. Nature Publishing Group UK 2018-07-09 /pmc/articles/PMC6037735/ /pubmed/29985432 http://dx.doi.org/10.1038/s41598-018-28673-7 Text en © The Author(s) 2018 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
Mioni, G.
Grondin, S.
Mapelli, D.
Stablum, F.
A tRNS investigation of the sensory representation of time
title A tRNS investigation of the sensory representation of time
title_full A tRNS investigation of the sensory representation of time
title_fullStr A tRNS investigation of the sensory representation of time
title_full_unstemmed A tRNS investigation of the sensory representation of time
title_short A tRNS investigation of the sensory representation of time
title_sort trns investigation of the sensory representation of time
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6037735/
https://www.ncbi.nlm.nih.gov/pubmed/29985432
http://dx.doi.org/10.1038/s41598-018-28673-7
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