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Integration of Motion Responses Underlying Directional Motion Anisotropy in Human Early Visual Cortical Areas
Recent imaging studies have reported directional motion biases in human visual cortex when perceiving moving random dot patterns. It has been hypothesized that these biases occur as a result of the integration of motion detector activation along the path of motion in visual cortex. In this study we...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3696083/ https://www.ncbi.nlm.nih.gov/pubmed/23840711 http://dx.doi.org/10.1371/journal.pone.0067468 |
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author | Schellekens, Wouter Van Wezel, Richard J. A. Petridou, Natalia Ramsey, Nick F. Raemaekers, Mathijs |
author_facet | Schellekens, Wouter Van Wezel, Richard J. A. Petridou, Natalia Ramsey, Nick F. Raemaekers, Mathijs |
author_sort | Schellekens, Wouter |
collection | PubMed |
description | Recent imaging studies have reported directional motion biases in human visual cortex when perceiving moving random dot patterns. It has been hypothesized that these biases occur as a result of the integration of motion detector activation along the path of motion in visual cortex. In this study we investigate the nature of such motion integration with functional MRI (fMRI) using different motion stimuli. Three types of moving random dot stimuli were presented, showing either coherent motion, motion with spatial decorrelations or motion with temporal decorrelations. The results from the coherent motion stimulus reproduced the centripetal and centrifugal directional motion biases in V1, V2 and V3 as previously reported. The temporally decorrelated motion stimulus resulted in both centripetal and centrifugal biases similar to coherent motion. In contrast, the spatially decorrelated motion stimulus resulted in small directional motion biases that were only present in parts of visual cortex coding for higher eccentricities of the visual field. In combination with previous results, these findings indicate that biased motion responses in early visual cortical areas most likely depend on the spatial integration of a simultaneously activated motion detector chain. |
format | Online Article Text |
id | pubmed-3696083 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-36960832013-07-09 Integration of Motion Responses Underlying Directional Motion Anisotropy in Human Early Visual Cortical Areas Schellekens, Wouter Van Wezel, Richard J. A. Petridou, Natalia Ramsey, Nick F. Raemaekers, Mathijs PLoS One Research Article Recent imaging studies have reported directional motion biases in human visual cortex when perceiving moving random dot patterns. It has been hypothesized that these biases occur as a result of the integration of motion detector activation along the path of motion in visual cortex. In this study we investigate the nature of such motion integration with functional MRI (fMRI) using different motion stimuli. Three types of moving random dot stimuli were presented, showing either coherent motion, motion with spatial decorrelations or motion with temporal decorrelations. The results from the coherent motion stimulus reproduced the centripetal and centrifugal directional motion biases in V1, V2 and V3 as previously reported. The temporally decorrelated motion stimulus resulted in both centripetal and centrifugal biases similar to coherent motion. In contrast, the spatially decorrelated motion stimulus resulted in small directional motion biases that were only present in parts of visual cortex coding for higher eccentricities of the visual field. In combination with previous results, these findings indicate that biased motion responses in early visual cortical areas most likely depend on the spatial integration of a simultaneously activated motion detector chain. Public Library of Science 2013-06-28 /pmc/articles/PMC3696083/ /pubmed/23840711 http://dx.doi.org/10.1371/journal.pone.0067468 Text en © 2013 Schellekens et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Schellekens, Wouter Van Wezel, Richard J. A. Petridou, Natalia Ramsey, Nick F. Raemaekers, Mathijs Integration of Motion Responses Underlying Directional Motion Anisotropy in Human Early Visual Cortical Areas |
title | Integration of Motion Responses Underlying Directional Motion Anisotropy in Human Early Visual Cortical Areas |
title_full | Integration of Motion Responses Underlying Directional Motion Anisotropy in Human Early Visual Cortical Areas |
title_fullStr | Integration of Motion Responses Underlying Directional Motion Anisotropy in Human Early Visual Cortical Areas |
title_full_unstemmed | Integration of Motion Responses Underlying Directional Motion Anisotropy in Human Early Visual Cortical Areas |
title_short | Integration of Motion Responses Underlying Directional Motion Anisotropy in Human Early Visual Cortical Areas |
title_sort | integration of motion responses underlying directional motion anisotropy in human early visual cortical areas |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3696083/ https://www.ncbi.nlm.nih.gov/pubmed/23840711 http://dx.doi.org/10.1371/journal.pone.0067468 |
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