Selective distortion of body image by asynchronous visuotactile stimulation

Article


Perez-Marcos, Daniel, Martini, M., Fuentes, Christina T., Bellido Rivas, Anna I., Haggard, Patrick and Sanchez-Vives, Maria V. 2017. Selective distortion of body image by asynchronous visuotactile stimulation. Body Image. 24, pp. 55-61.
AuthorsPerez-Marcos, Daniel, Martini, M., Fuentes, Christina T., Bellido Rivas, Anna I., Haggard, Patrick and Sanchez-Vives, Maria V.
Abstract

In the rubber hand illusion (RHI), a rubber hand is felt as being part of one’s body. This illusion is evoked by providing synchronous visuotactile stimulation to the fake and real hands. Asynchronous visuotactile stimulation is known not to produce such an illusion of ownership, being commonly used as the control condition. Here we explored the impact of synchronous and asynchronous visuotactile stimulation on the body image. We combined the induction of the RHI with a quantitative test for the internal representation of body metrics (i.e., the positions of key fiducial points on the body relative to each other). We found a significant recalibration of the upper/lower arm lengths following asynchronous visuotactile stimulation. In particular, we observed a selective elongation of the lower arm, a distortion typical of deafferentation. Conversely, synchronous visuotactile stimulation did not alter the estimation of the arm segments' length. Our findings are consistent with a dynamic internal representation of body image that is continuously updated based on incoming multisensory information. Furthermore, the use of asynchronous multisensory stimulation as a neutral condition should be reconsidered since it introduces changes in the body image.

JournalBody Image
Journal citation24, pp. 55-61
ISSN17401445
Year2017
PublisherElsevier
Accepted author manuscript
License
Accepted author manuscript
License
Digital Object Identifier (DOI)doi:10.1016/j.bodyim.2017.11.002
Web address (URL)https://doi.org/10.1016/j.bodyim.2017.11.002
Publication dates
Online18 Dec 2017
Publication process dates
Deposited20 Dec 2017
Accepted08 Nov 2017
Accepted08 Nov 2017
FunderFP7 European collaborative projects BEAMING (248620) and VERE (257695)
CERCA Programme/Generalitat de Catalunya.
Seventh Framework Programme
Seventh Framework Programme
Generalitat de Catalunya
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https://repository.uel.ac.uk/item/84977

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