Cataldo, Antonio;
Crivelli, Damiano;
Bottini, Gabriella;
Gomi, Hiroaki;
Haggard, Patrick;
(2024)
Active self-touch restores bodily proprioceptive spatial awareness following disruption by 'rubber hand illusion'.
Proceedings of the Royal Society B: Biological Sciences
, 291
(2015)
, Article 20231753. 10.1098/rspb.2023.1753.
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Abstract
Bodily self-awareness relies on a constant integration of visual, tactile, proprioceptive, and motor signals. In the 'rubber hand illusion' (RHI), conflicting visuo-tactile stimuli lead to changes in self-awareness. It remains unclear whether other, somatic signals could compensate for the alterations in self-awareness caused by visual information about the body. Here, we used the RHI in combination with robot-mediated self-touch to systematically investigate the role of tactile, proprioceptive and motor signals in maintaining and restoring bodily self-awareness. Participants moved the handle of a leader robot with their right hand and simultaneously received corresponding tactile feedback on their left hand from a follower robot. This self-touch stimulation was performed either before or after the induction of a classical RHI. Across three experiments, active self-touch delivered after-but not before-the RHI, significantly reduced the proprioceptive drift caused by RHI, supporting a restorative role of active self-touch on bodily self-awareness. The effect was not present during involuntary self-touch. Unimodal control conditions confirmed that both tactile and motor components of self-touch were necessary to restore bodily self-awareness. We hypothesize that active self-touch transiently boosts the precision of proprioceptive representation of the touched body part, thus counteracting the visual capture effects that underlie the RHI.
| Type: | Article |
|---|---|
| Title: | Active self-touch restores bodily proprioceptive spatial awareness following disruption by 'rubber hand illusion' |
| Location: | England |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1098/rspb.2023.1753 |
| Publisher version: | https://doi.org/10.1098/rspb.2023.1753 |
| Language: | English |
| Additional information: | © 2024 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. |
| Keywords: | bodily self-awareness, body ownership, rubber hand illusion, self-touch, voluntary action, Humans, Touch, Illusions, Visual Perception, Touch Perception, Hand, Proprioception, Body Image |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences > Institute of Cognitive Neuroscience |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10186158 |
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