Changes in perceived peripersonal space following the rubber hand illusion.

Autor: Smit M; Department of Experimental Psychology, Helmholtz Institute, Utrecht University, Utrecht, The Netherlands., Dijkerman HC; Department of Experimental Psychology, Helmholtz Institute, Utrecht University, Utrecht, The Netherlands. c.dijkerman@uu.nl., Kurstjens V; Department of Experimental Psychology, Helmholtz Institute, Utrecht University, Utrecht, The Netherlands., de Haan AM; Department of Experimental Psychology, Helmholtz Institute, Utrecht University, Utrecht, The Netherlands.; Innovative Testing in Life Sciences and Chemistry, University of Applied Sciences Utrecht, Utrecht, The Netherlands., van der Ham IJM; Department of Health, Medical, and Neuropsychology, Leiden University, Leiden, The Netherlands., van der Smagt MJ; Department of Experimental Psychology, Helmholtz Institute, Utrecht University, Utrecht, The Netherlands.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2023 May 12; Vol. 13 (1), pp. 7713. Date of Electronic Publication: 2023 May 12.
DOI: 10.1038/s41598-023-34620-y
Abstrakt: Peripersonal space (PPS), the region immediately surrounding the body is essential for bodily protection and goal directed action. Previous studies have suggested that the PPS is anchored to one's own body and in the current study we investigated whether the PPS could be modulated by changes in perceived body ownership. While theoretically important, this anchoring can also have implications for patients with altered body perception. The rubber hand illusion (RHI) is a way to manipulate body ownership. We hypothesized that after induction of a left hand RHI, the perceived space around the body shifts to the right. Sixty-five participants performed a landmark task before and after a left hand RHI. In the landmark task, participants had to determine whether a vertical landmark line was left or right from the center of a horizontal screen. One group of the participants was exposed to synchronous stroking, the other group experienced asynchronous stroking. Results showed a shift in space to the right (e.g. away from the own arm), but only for the 'synchronous stroking' group. These results suggest that the relevant action space becomes linked to the fake hand. Critically, subjective ownership experience did not correlate with this shift, but proprioceptive drift did. This suggests that multisensory integration of bodily information drives this shift in space around the body and not feelings of ownership.
(© 2023. The Author(s).)
Databáze: MEDLINE
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