Audio Visual Stimuli Based out of Body Illusion

Overview

Journal Sci Rep

Specialty Science

Date 2024 Oct 18

PMID 39424919

Authors

Yuta Euchi

Hirotaka Uchitomi

Yoshihiro Miyake

Affiliations

Soon will be listed here.

Abstract

Previous studies have reported that bodily self-consciousness could be altered so that one's body was perceived in extra-personal space. However, whether this could be induced without tactile stimuli has not been investigated. We investigated whether out-of-body illusion could be induced via synchronized audio-visual stimuli, in which auditory stimuli were used instead of tactile stimuli. We conducted an experiment in which a sounding bell was moved in front of the participant, and synchronously, a non-sounding bell was moved in front of a camera that captured the image and projected on a head-mounted device. We expected the participants to experience that the sound came from the non-sounding bell in the video and they were in the camera's position. Results from the questionnaires conducted after the experiment revealed that items related to out-of-body illusion were significantly enhanced in the synchronized conditions. Furthermore, participants reported a similarly strong out-of-body illusion for both the synchronized audio-visual and tactile-visual stimuli. This study demonstrated that out-of-body illusion could also be induced by synchronized audio-visual stimuli, which was a novel finding.

References

Radziun D, Ehrsson H . Auditory cues influence the rubber-hand illusion. J Exp Psychol Hum Percept Perform. 2018; 44(7):1012-1021. DOI: 10.1037/xhp0000508. View

Chancel M, Ehrsson H, Ma W . Uncertainty-based inference of a common cause for body ownership. Elife. 2022; 11. PMC: 9555868. DOI: 10.7554/eLife.77221. View

Nakul E, Orlando-Dessaints N, Lenggenhager B, Lopez C . Measuring perceived self-location in virtual reality. Sci Rep. 2020; 10(1):6802. PMC: 7176655. DOI: 10.1038/s41598-020-63643-y. View

Guterstam A, Ehrsson H . Disowning one's seen real body during an out-of-body illusion. Conscious Cogn. 2012; 21(2):1037-42. DOI: 10.1016/j.concog.2012.01.018. View

Gentile G, Guterstam A, Brozzoli C, Ehrsson H . Disintegration of multisensory signals from the real hand reduces default limb self-attribution: an fMRI study. J Neurosci. 2013; 33(33):13350-66. PMC: 3742923. DOI: 10.1523/JNEUROSCI.1363-13.2013. View

Petkova V, Ehrsson H . If I were you: perceptual illusion of body swapping. PLoS One. 2008; 3(12):e3832. PMC: 2585011. DOI: 10.1371/journal.pone.0003832. View

Kaplan R, Enticott P, Hohwy J, Castle D, Rossell S . Is body dysmorphic disorder associated with abnormal bodily self-awareness? A study using the rubber hand illusion. PLoS One. 2014; 9(6):e99981. PMC: 4055788. DOI: 10.1371/journal.pone.0099981. View

Blanke O, Slater M, Serino A . Behavioral, Neural, and Computational Principles of Bodily Self-Consciousness. Neuron. 2015; 88(1):145-66. DOI: 10.1016/j.neuron.2015.09.029. View

Pamment J, Aspell J . Putting pain out of mind with an 'out of body' illusion. Eur J Pain. 2016; 21(2):334-342. DOI: 10.1002/ejp.927. View

10.

Palluel E, Aspell J, Lavanchy T, Blanke O . Experimental changes in bodily self-consciousness are tuned to the frequency sensitivity of proprioceptive fibres. Neuroreport. 2012; 23(6):354-9. DOI: 10.1097/WNR.0b013e328351db14. View

11.

Guterstam A, Abdulkarim Z, Ehrsson H . Illusory ownership of an invisible body reduces autonomic and subjective social anxiety responses. Sci Rep. 2015; 5:9831. PMC: 4407500. DOI: 10.1038/srep09831. View

12.

Bunning S, Blanke O . The out-of body experience: precipitating factors and neural correlates. Prog Brain Res. 2005; 150:331-50. DOI: 10.1016/S0079-6123(05)50024-4. View

13.

Kilteni K, Maselli A, Kording K, Slater M . Over my fake body: body ownership illusions for studying the multisensory basis of own-body perception. Front Hum Neurosci. 2015; 9:141. PMC: 4371812. DOI: 10.3389/fnhum.2015.00141. View

14.

Tajadura-Jimenez A, Valjamae A, Toshima I, Kimura T, Tsakiris M, Kitagawa N . Action sounds recalibrate perceived tactile distance. Curr Biol. 2012; 22(13):R516-7. DOI: 10.1016/j.cub.2012.04.028. View

15.

Ehrsson H . The experimental induction of out-of-body experiences. Science. 2007; 317(5841):1048. DOI: 10.1126/science.1142175. View

16.

Fujisaki W, Nishida S . Audio-tactile superiority over visuo-tactile and audio-visual combinations in the temporal resolution of synchrony perception. Exp Brain Res. 2009; 198(2-3):245-59. DOI: 10.1007/s00221-009-1870-x. View

17.

Petkova V, Bjornsdotter M, Gentile G, Jonsson T, Li T, Ehrsson H . From part- to whole-body ownership in the multisensory brain. Curr Biol. 2011; 21(13):1118-22. DOI: 10.1016/j.cub.2011.05.022. View

18.

Meredith M, Nemitz J, Stein B . Determinants of multisensory integration in superior colliculus neurons. I. Temporal factors. J Neurosci. 1987; 7(10):3215-29. PMC: 6569162. View

19.

Maselli A, Slater M . Sliding perspectives: dissociating ownership from self-location during full body illusions in virtual reality. Front Hum Neurosci. 2014; 8:693. PMC: 4161166. DOI: 10.3389/fnhum.2014.00693. View

20.

Guterstam A, Bjornsdotter M, Bergouignan L, Gentile G, Li T, Ehrsson H . Decoding illusory self-location from activity in the human hippocampus. Front Hum Neurosci. 2015; 9:412. PMC: 4502353. DOI: 10.3389/fnhum.2015.00412. View