Anchoring the Self to the Body in Bilateral Vestibular Failure - Archive ouverte HAL Access content directly
Journal Articles PLoS ONE Year : 2017

Anchoring the Self to the Body in Bilateral Vestibular Failure

(1) , (2) , (2) , (2) , (2, 3) , (1)
1
2
3

Abstract

Recent findings suggest that vestibular information plays a significant role in anchoring the self to the body. Out-of-body experiences of neurological origin are frequently associated with vestibular sensations, and galvanic vestibular stimulation in healthy participants anchors the self to the body. Here, we provide the first objective measures of anchoring the self to the body in chronic bilateral vestibular failure (BVF). We compared 23 patients with idiopathic BVF to 23 healthy participants in a series of experiments addressing several aspects of visuo-spatial perspective taking and embodiment. In Experiment 1, participants were involved in a virtual "dot-counting task" from their own perspective or the perspective of a distant avatar, to measure implicit and explicit perspective taking, respectively. In both groups, response times increased similarly when the avatar's and participant's viewpoint differed , for both implicit and explicit perspective taking. In Experiment 2, participants named ambiguous letters (such as "b" or "q") traced on their forehead that could be perceived from an internal or external perspective. The frequency of perceiving ambiguous letters from an internal perspective was similar in both groups. In Experiment 3, participants completed a questionnaire measuring the experienced self/body and self/environment "closeness". Both groups reported a similar embodied experience. Altogether, our data show that idiopathic BVF does not change implicit and explicit perspective taking nor subjective anchoring of the self to the body. Our negative findings offer insight into the multisensory mechanisms of embodiment. Only acute peripheral vestibular disorders and neurological disorders in ves-tibular brain areas (characterized by strong multisensory conflicts) may evoke disembodied experiences.
Fichier principal
Vignette du fichier
deroualle 2017 PlosOne.pdf (2.76 Mo) Télécharger le fichier
Origin : Publication funded by an institution
Loading...

Dates and versions

hal-02121685 , version 1 (06-05-2019)

Licence

Attribution - CC BY 4.0

Identifiers

Cite

Diane Deroualle, Michel Toupet, Christian van Nechel, Ulla Duquesne, Charlotte Hautefort, et al.. Anchoring the Self to the Body in Bilateral Vestibular Failure. PLoS ONE, 2017, 12 (1), pp.e0170488. ⟨10.1371/journal.pone.0170488⟩. ⟨hal-02121685⟩

Collections

CNRS UNIV-AMU
130 View
197 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More