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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...

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Autores principales: Smith, Fraser W., Goodale, Melvyn A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2015
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.
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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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