Sanders, Z., Dempsey‐Jones, H. orcid.org/0000-0002-9360-7842, Wesselink, D.B. et al. (4 more authors) (2023) Similar somatotopy for active and passive digit representation in primary somatosensory cortex. Human Brain Mapping. ISSN 1065-9471
Abstract
Scientists traditionally use passive stimulation to examine the organisation of primary somatosensory cortex (SI). However, given the close, bidirectional relationship between the somatosensory and motor systems, active paradigms involving free movement may uncover alternative SI representational motifs. Here, we used 7 Tesla functional magnetic resonance imaging to compare hallmark features of SI digit representation between active and passive tasks which were unmatched on task or stimulus properties. The spatial location of digit maps, somatotopic organisation, and inter-digit representational structure were largely consistent between tasks, indicating representational consistency. We also observed some task differences. The active task produced higher univariate activity and multivariate representational information content (inter-digit distances). The passive task showed a trend towards greater selectivity for digits versus their neighbours. Our findings highlight that, while the gross features of SI functional organisation are task invariant, it is important to also consider motor contributions to digit representation.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2023 The Authors. Human Brain Mapping published by Wiley Periodicals LLC. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. https://creativecommons.org/licenses/by/4.0/ |
Keywords: | finger representations; fMRI; hand map; motor; representational similarity analysis; somatosensation; topography |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Psychology (Sheffield) |
Funding Information: | Funder Grant number LEVERHULME TRUST (THE) RPG-2022-031 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 10 May 2023 09:51 |
Last Modified: | 03 Oct 2024 13:42 |
Status: | Published |
Publisher: | Wiley |
Refereed: | Yes |
Identification Number: | 10.1002/hbm.26298 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:198979 |