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Decoding Visual Object Categories in Early Somatosensory Cortex
Neurons, even in the earliest sensory areas of cortex, are subject to a great deal of contextual influence from both within and across modality connections. In the present work, we investigated whether the earliest regions of somatosensory cortex (S1 and S2) would contain content-specific informatio...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Oxford University Press
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4380001/ https://www.ncbi.nlm.nih.gov/pubmed/24122136 http://dx.doi.org/10.1093/cercor/bht292 |
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author | Smith, Fraser W. Goodale, Melvyn A. |
author_facet | Smith, Fraser W. Goodale, Melvyn A. |
author_sort | Smith, Fraser W. |
collection | PubMed |
description | Neurons, even in the earliest sensory areas of cortex, are subject to a great deal of contextual influence from both within and across modality connections. In the present work, we investigated whether the earliest regions of somatosensory cortex (S1 and S2) would contain content-specific information about visual object categories. We reasoned that this might be possible due to the associations formed through experience that link different sensory aspects of a given object. Participants were presented with visual images of different object categories in 2 fMRI experiments. Multivariate pattern analysis revealed reliable decoding of familiar visual object category in bilateral S1 (i.e., postcentral gyri) and right S2. We further show that this decoding is observed for familiar but not unfamiliar visual objects in S1. In addition, whole-brain searchlight decoding analyses revealed several areas in the parietal lobe that could mediate the observed context effects between vision and somatosensation. These results demonstrate that even the first cortical stages of somatosensory processing carry information about the category of visually presented familiar objects. |
format | Online Article Text |
id | pubmed-4380001 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Oxford University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-43800012015-04-15 Decoding Visual Object Categories in Early Somatosensory Cortex Smith, Fraser W. Goodale, Melvyn A. Cereb Cortex Articles Neurons, even in the earliest sensory areas of cortex, are subject to a great deal of contextual influence from both within and across modality connections. In the present work, we investigated whether the earliest regions of somatosensory cortex (S1 and S2) would contain content-specific information about visual object categories. We reasoned that this might be possible due to the associations formed through experience that link different sensory aspects of a given object. Participants were presented with visual images of different object categories in 2 fMRI experiments. Multivariate pattern analysis revealed reliable decoding of familiar visual object category in bilateral S1 (i.e., postcentral gyri) and right S2. We further show that this decoding is observed for familiar but not unfamiliar visual objects in S1. In addition, whole-brain searchlight decoding analyses revealed several areas in the parietal lobe that could mediate the observed context effects between vision and somatosensation. These results demonstrate that even the first cortical stages of somatosensory processing carry information about the category of visually presented familiar objects. Oxford University Press 2015-04 2013-10-11 /pmc/articles/PMC4380001/ /pubmed/24122136 http://dx.doi.org/10.1093/cercor/bht292 Text en © The Author 2013. Published by Oxford University Press. http://creativecommons.org/licenses/by-nc/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com |
spellingShingle | Articles Smith, Fraser W. Goodale, Melvyn A. Decoding Visual Object Categories in Early Somatosensory Cortex |
title | Decoding Visual Object Categories in Early Somatosensory Cortex |
title_full | Decoding Visual Object Categories in Early Somatosensory Cortex |
title_fullStr | Decoding Visual Object Categories in Early Somatosensory Cortex |
title_full_unstemmed | Decoding Visual Object Categories in Early Somatosensory Cortex |
title_short | Decoding Visual Object Categories in Early Somatosensory Cortex |
title_sort | decoding visual object categories in early somatosensory cortex |
topic | Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4380001/ https://www.ncbi.nlm.nih.gov/pubmed/24122136 http://dx.doi.org/10.1093/cercor/bht292 |
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