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More than skin-deep: Integration of skin-based and musculoskeletal reference frames in localization of touch

Sadibolova, Renata, Tamè, Luigi, Longo, Matthew R. (2018) More than skin-deep: Integration of skin-based and musculoskeletal reference frames in localization of touch. Journal of Experimental Psychology: Human Perception and Performance, 44 (11). pp. 1672-1682. ISSN 0096-1523. (doi:10.1037/xhp0000562)

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Abstract

The skin of the forearm is, in one sense, a flat 2D sheet, but in another sense approximately cylindrical, mirroring the 3D volumetric shape of the arm. The role of frames of reference based on the skin as a 2D sheet versus based on the musculo-skeletal structure of the arm remains unclear. When we rotate the forearm from a pronated to a supinated posture, the skin on its surface is displaced. Thus, a marked location will slide with the skin across the underlying flesh, and the touch perceived at this location should follow this displacement if it is localised within a skin-based reference frame. We investigated, however, if the perceived tactile locations were also affected by the rearrangement in underlying musculo skeletal structure, i.e. displaced medially and laterally on a pronated and supinated forearm, respectively. Participants pointed to perceived touches (Experiment 1), or marked them on a three-dimensional size-matched forearm on a computer screen (Experiment 2). The perceived

grid was perceptually stretched at medial-lateral axis, and it was displaced distally, which suggest the influence of skin-based factors. Our study extends the tactile localisation literature focused on the skin-based reference frame and on the effects of spatial positions of

body parts by implicating the musculo-skeletal factors in localisation of touch on the body.

Item Type: Article
DOI/Identification number: 10.1037/xhp0000562
Uncontrolled keywords: Tactile localisation, forearm, tactile spatial reference frame, body representation
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Divisions: Faculties > Social Sciences > School of Psychology
Depositing User: Luigi Tame
Date Deposited: 12 Jan 2019 17:36 UTC
Last Modified: 15 Jan 2020 09:21 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/71617 (The current URI for this page, for reference purposes)
Tamè, Luigi: https://orcid.org/0000-0002-9172-2281
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