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The large-scale organization of shape processing in the ventral and dorsal pathways
Although shape perception is considered a function of the ventral visual pathway, evidence suggests that the dorsal pathway also derives shape-based representations. In two psychophysics and neuroimaging experiments, we characterized the response properties, topographical organization and perceptual...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
eLife Sciences Publications, Ltd
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5659821/ https://www.ncbi.nlm.nih.gov/pubmed/28980938 http://dx.doi.org/10.7554/eLife.27576 |
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author | Freud, Erez Culham, Jody C Plaut, David C Behrmann, Marlene |
author_facet | Freud, Erez Culham, Jody C Plaut, David C Behrmann, Marlene |
author_sort | Freud, Erez |
collection | PubMed |
description | Although shape perception is considered a function of the ventral visual pathway, evidence suggests that the dorsal pathway also derives shape-based representations. In two psychophysics and neuroimaging experiments, we characterized the response properties, topographical organization and perceptual relevance of these representations. In both pathways, shape sensitivity increased from early visual cortex to extrastriate cortex but then decreased in anterior regions. Moreover, the lateral aspect of the ventral pathway and posterior regions of the dorsal pathway were sensitive to the availability of fundamental shape properties, even for unrecognizable images. This apparent representational similarity between the posterior-dorsal and lateral-ventral regions was corroborated by a multivariate analysis. Finally, as with ventral pathway, the activation profile of posterior dorsal regions was correlated with recognition performance, suggesting a possible contribution to perception. These findings challenge a strict functional dichotomy between the pathways and suggest a more distributed model of shape processing. |
format | Online Article Text |
id | pubmed-5659821 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | eLife Sciences Publications, Ltd |
record_format | MEDLINE/PubMed |
spelling | pubmed-56598212017-10-30 The large-scale organization of shape processing in the ventral and dorsal pathways Freud, Erez Culham, Jody C Plaut, David C Behrmann, Marlene eLife Neuroscience Although shape perception is considered a function of the ventral visual pathway, evidence suggests that the dorsal pathway also derives shape-based representations. In two psychophysics and neuroimaging experiments, we characterized the response properties, topographical organization and perceptual relevance of these representations. In both pathways, shape sensitivity increased from early visual cortex to extrastriate cortex but then decreased in anterior regions. Moreover, the lateral aspect of the ventral pathway and posterior regions of the dorsal pathway were sensitive to the availability of fundamental shape properties, even for unrecognizable images. This apparent representational similarity between the posterior-dorsal and lateral-ventral regions was corroborated by a multivariate analysis. Finally, as with ventral pathway, the activation profile of posterior dorsal regions was correlated with recognition performance, suggesting a possible contribution to perception. These findings challenge a strict functional dichotomy between the pathways and suggest a more distributed model of shape processing. eLife Sciences Publications, Ltd 2017-10-05 /pmc/articles/PMC5659821/ /pubmed/28980938 http://dx.doi.org/10.7554/eLife.27576 Text en © 2017, Freud et al http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/This article is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use and redistribution provided that the original author and source are credited. |
spellingShingle | Neuroscience Freud, Erez Culham, Jody C Plaut, David C Behrmann, Marlene The large-scale organization of shape processing in the ventral and dorsal pathways |
title | The large-scale organization of shape processing in the ventral and dorsal pathways |
title_full | The large-scale organization of shape processing in the ventral and dorsal pathways |
title_fullStr | The large-scale organization of shape processing in the ventral and dorsal pathways |
title_full_unstemmed | The large-scale organization of shape processing in the ventral and dorsal pathways |
title_short | The large-scale organization of shape processing in the ventral and dorsal pathways |
title_sort | large-scale organization of shape processing in the ventral and dorsal pathways |
topic | Neuroscience |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5659821/ https://www.ncbi.nlm.nih.gov/pubmed/28980938 http://dx.doi.org/10.7554/eLife.27576 |
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