Decoding visual object categories in early somatosensory cortex

Smith, Fraser ORCID: and Goodale, Melvyn (2015) Decoding visual object categories in early somatosensory cortex. Cerebral Cortex, 25 (4). pp. 1020-1031. ISSN 1047-3211

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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.

Item Type: Article
Additional Information: © The Author 2013. Published by Oxford University Press. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (, 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.
Uncontrolled Keywords: s1,s2,multivoxel pattern analysis,posterior parietal cortex,multisensory
Faculty \ School: Faculty of Social Sciences > School of Psychology
UEA Research Groups: Faculty of Social Sciences > Research Groups > Cognition, Action and Perception
Depositing User: Pure Connector
Date Deposited: 16 Jan 2015 15:40
Last Modified: 06 Nov 2022 07:30
DOI: 10.1093/cercor/bht292


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