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Modulation of Bodily Self-Consciousness by Self and External Touch.
- Source :
-
IEEE transactions on haptics [IEEE Trans Haptics] 2021 Jul-Sep; Vol. 14 (3), pp. 615-625. Date of Electronic Publication: 2021 Sep 09. - Publication Year :
- 2021
-
Abstract
- The full body illusion (FBI) is a bodily illusion based on the application of multisensory conflicts that induce changes in bodily self-consciousness (BSC). This has been used to study cognitive brain mechanisms underlying body ownership and related aspects of self-consciousness. Typically, such paradigms employ external passive multisensory stimulation, thus neglecting the possible contributions of self-generated action and haptic cues to body ownership. In this article, the effects of both external and voluntary self-touch on BSC were examined with a robotics-based FBI paradigm. We compared the effects of classical passive visuotactile stimulation and active self-touch (in which experimental participants had a sense of agency over the tactile stimulation) on the FBI. We evaluated these effects using a questionnaire, crossmodal congruency task, and measurements of changes in self-location. The results indicated that both synchronous passive visuotactile stimulation and synchronous active self-touch induced illusory ownership over a virtual body, without significant differences in their magnitudes. However, the FBI induced by active self-touch was associated with a larger drift in self-location towards the virtual body. These results show that movement-related signals arising from self-touch impact the BSC not only for hand ownership but also for torso-centered body ownership and related aspects of BSC.
Details
- Language :
- English
- ISSN :
- 2329-4051
- Volume :
- 14
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- IEEE transactions on haptics
- Publication Type :
- Academic Journal
- Accession number :
- 33750715
- Full Text :
- https://doi.org/10.1109/TOH.2021.3067651