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  Visual and somatosensory information contribute to distortions of the body model

Peviani, V., Melloni, L., & Bottini, G. (2019). Visual and somatosensory information contribute to distortions of the body model. Scientific Reports, 9: 13570. doi:10.1038/s41598-019-49979-0.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-D3B5-1 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-D3B6-0
Genre: Journal Article

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The Author(s) 2019. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.

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 Creators:
Peviani, Valeria1, 2, Author              
Melloni, Lucia1, 3, Author              
Bottini, Gabriella2, 4, 5, Author
Affiliations:
1Department of Neuroscience, Max Planck Institute for Empirical Aesthetics, Max Planck Society, ou_2421697              
2Department of Brain and Behavioural Sciences, University of Pavia, Via Bassi 21, 27100, Pavia, Italy, ou_persistent22              
3Department of Neurology, New York University School of Medicine, 240 East 38th St 10016, New York, NY, USA, ou_persistent22              
4Cognitive Neuropsychology Center , ASST Grande Ospedale Metropolitano Niguarda, Piazza dell’Ospedale Maggiore 3, 20162, Milan, Italy, ou_persistent22              
5NeuroMi, Milan Center for Neuroscience, Milan, Italy , ou_persistent22              

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Free keywords: Human behaviour; Perception
 Abstract: Distorted representations of the body are observed in healthy individuals as well as in neurological and psychiatric disorders. Distortions of the body model have been attributed to the somatotopic cerebral representation. Recently, it has been demonstrated that visual biases also contribute to those distortions. To better understand the sources of such distortions, we compared the metric representations across five body parts affording different degrees of tactile sensitivity and visual accessibility. We evaluated their perceived dimensions using a Line Length Judgment task. We found that most body parts were underestimated in their dimensions. The estimation error relative to their length was predicted by their tactile acuity, supporting the influence of the cortical somatotopy on the body model. However, tactile acuity did not explain the distortions observed for the width. Visual accessibility in turn does appear to mediate body distortions, as we observed that the dimensions of the dorsal portion of the neck were the only ones accurately perceived. Coherent with the multisensory nature of body representations, we argue that the perceived dimensions of body parts are estimated by integrating visual and somatosensory information, each weighted differently, based on their availability for a given body part and a given spatial dimension.

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Language(s): eng - English
 Dates: 2019-04-302019-08-162019-09-19
 Publication Status: Published online
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 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1038/s41598-019-49979-0
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Title: Scientific Reports
  Abbreviation : Sci. Rep.
Source Genre: Journal
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Publ. Info: London, UK : Nature Publishing Group
Pages: - Volume / Issue: 9 Sequence Number: 13570 Start / End Page: - Identifier: ISSN: 2045-2322
CoNE: https://pure.mpg.de/cone/journals/resource/2045-2322