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Spatiotemporal Dynamics of Cortical Representations during and after Stimulus Presentation
Visual perception is a spatiotemporally complex process. In this study, we investigated cortical dynamics during and after stimulus presentation. We observed that visual category information related to the difference between faces and objects became apparent in the occipital lobe after 63 ms. Within...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4860392/ https://www.ncbi.nlm.nih.gov/pubmed/27242453 http://dx.doi.org/10.3389/fnsys.2016.00042 |
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author | van de Nieuwenhuijzen, Marieke E. van den Borne, Eva W. P. Jensen, Ole van Gerven, Marcel A. J. |
author_facet | van de Nieuwenhuijzen, Marieke E. van den Borne, Eva W. P. Jensen, Ole van Gerven, Marcel A. J. |
author_sort | van de Nieuwenhuijzen, Marieke E. |
collection | PubMed |
description | Visual perception is a spatiotemporally complex process. In this study, we investigated cortical dynamics during and after stimulus presentation. We observed that visual category information related to the difference between faces and objects became apparent in the occipital lobe after 63 ms. Within the next 110 ms, activation spread out to include the temporal lobe before returning to residing mainly in the occipital lobe again. After stimulus offset, a peak in information was observed, comparable to the peak after stimulus onset. Moreover, similar processes, albeit not identical, seemed to underlie both peaks. Information about the categorical identity of the stimulus remained present until 677 ms after stimulus offset, during which period the stimulus had to be retained in working memory. Activation patterns initially resembled those observed during stimulus presentation. After about 200 ms, however, this representation changed and class-specific activity became more equally distributed over the four lobes. These results show that, although there are common processes underlying stimulus representation both during and after stimulus presentation, these representations change depending on the specific stage of perception and maintenance. |
format | Online Article Text |
id | pubmed-4860392 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-48603922016-05-30 Spatiotemporal Dynamics of Cortical Representations during and after Stimulus Presentation van de Nieuwenhuijzen, Marieke E. van den Borne, Eva W. P. Jensen, Ole van Gerven, Marcel A. J. Front Syst Neurosci Neuroscience Visual perception is a spatiotemporally complex process. In this study, we investigated cortical dynamics during and after stimulus presentation. We observed that visual category information related to the difference between faces and objects became apparent in the occipital lobe after 63 ms. Within the next 110 ms, activation spread out to include the temporal lobe before returning to residing mainly in the occipital lobe again. After stimulus offset, a peak in information was observed, comparable to the peak after stimulus onset. Moreover, similar processes, albeit not identical, seemed to underlie both peaks. Information about the categorical identity of the stimulus remained present until 677 ms after stimulus offset, during which period the stimulus had to be retained in working memory. Activation patterns initially resembled those observed during stimulus presentation. After about 200 ms, however, this representation changed and class-specific activity became more equally distributed over the four lobes. These results show that, although there are common processes underlying stimulus representation both during and after stimulus presentation, these representations change depending on the specific stage of perception and maintenance. Frontiers Media S.A. 2016-05-09 /pmc/articles/PMC4860392/ /pubmed/27242453 http://dx.doi.org/10.3389/fnsys.2016.00042 Text en Copyright © 2016 van de Nieuwenhuijzen, van den Borne, Jensen and van Gerven. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Neuroscience van de Nieuwenhuijzen, Marieke E. van den Borne, Eva W. P. Jensen, Ole van Gerven, Marcel A. J. Spatiotemporal Dynamics of Cortical Representations during and after Stimulus Presentation |
title | Spatiotemporal Dynamics of Cortical Representations during and after Stimulus Presentation |
title_full | Spatiotemporal Dynamics of Cortical Representations during and after Stimulus Presentation |
title_fullStr | Spatiotemporal Dynamics of Cortical Representations during and after Stimulus Presentation |
title_full_unstemmed | Spatiotemporal Dynamics of Cortical Representations during and after Stimulus Presentation |
title_short | Spatiotemporal Dynamics of Cortical Representations during and after Stimulus Presentation |
title_sort | spatiotemporal dynamics of cortical representations during and after stimulus presentation |
topic | Neuroscience |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4860392/ https://www.ncbi.nlm.nih.gov/pubmed/27242453 http://dx.doi.org/10.3389/fnsys.2016.00042 |
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