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Look but don’t touch: visual cues to surface structure drive somatosensory cortex


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Publication Date: 2016-01-09

Journal Title: NeuroImage

Publisher: Elsevier

Volume: 128

Pages: 353-361

Language: English

Type: Article

Metadata: Show full item record

Citation: Sun, H., Welchman, A. E., Chang, D. H. F., & di Luca, M. (2016). Look but don’t touch: visual cues to surface structure drive somatosensory cortex. NeuroImage, 128 353-361.

Description: This is the final version of the article. It first appeared from Elsevier via http://dx.doi.org/10.1016/j.neuroimage.2015.12.054

Abstract: When planning interactions with nearby objects, our brain uses visual information to estimate shape, material composition, and surface structure before we come into contact with them. Here we analyse brain activations elicited by different types of visual appearance, measuring fMRI responses to objects that are glossy, matte, rough, or textured. In addition to activation in visual areas, we found that fMRI responses are evoked in the secondary somatosensory area (S2) when looking at glossy and rough surfaces. This activity could be reliably discriminated on the basis of tactile-related visual properties (gloss, rough, and matte), but importantly, other visual properties (i.e., coloured texture) did not substantially change fMRI activity. The activity could not be solely due to tactile imagination, as asking explicitly to imagine such surface properties did not lead to the same results. These findings suggest that visual cues to an object's surface properties evoke activity in neural circuits associated with tactile stimulation. This activation may reflect the a-priori probability of the physics of the interaction (i.e., the expectation of upcoming friction) that can be used to plan finger placement and grasp force.

Keywords: roughness, glossiness, visual material, fMRI, MVPA

Sponsorship: This project was supported by the Wellcome Trust (095183/Z/10/Z).

Embargo Lift Date: 2300-01-01

Identifiers:

This record's URL: https://www.repository.cam.ac.uk/handle/1810/253234http://dx.doi.org/10.1016/j.neuroimage.2015.12.054

Rights: Attribution 2.0 UK: England & Wales

Licence URL: http://creativecommons.org/licenses/by/2.0/uk/





Autor: Sun, Hua-ChunWelchman, Andrew E.Chang, Dorita H. F.di Luca, Massimiliano

Fuente: https://www.repository.cam.ac.uk/handle/1810/253234



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