Non-invasive brain stimulation of motor cortex induces embodiment when integrated with virtual reality feedback.

Détails

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Etat: Public
Version: Final published version
Licence: CC BY 4.0
ID Serval
serval:BIB_19A505E60B1D
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Non-invasive brain stimulation of motor cortex induces embodiment when integrated with virtual reality feedback.
Périodique
The European journal of neuroscience
Auteur⸱e⸱s
Bassolino M., Franza M., Bello Ruiz J., Pinardi M., Schmidlin T., Stephan M.A., Solcà M., Serino A., Blanke O.
ISSN
1460-9568 (Electronic)
ISSN-L
0953-816X
Statut éditorial
Publié
Date de publication
04/2018
Peer-reviewed
Oui
Volume
47
Numéro
7
Pages
790-799
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Résumé
Previous evidence highlighted the multisensory-motor origin of embodiment - that is, the experience of having a body and of being in control of it - and the possibility of experimentally manipulating it. For instance, an illusory feeling of embodiment towards a fake hand can be triggered by providing synchronous visuo-tactile stimulation to the hand of participants and to a fake hand or by asking participants to move their hand and observe a fake hand moving accordingly (rubber hand illusion). Here, we tested whether it is possible to manipulate embodiment not through stimulation of the participant's hand, but by directly tapping into the brain's hand representation via non-invasive brain stimulation. To this aim, we combined transcranial magnetic stimulation (TMS), to activate the hand corticospinal representation, with virtual reality (VR), to provide matching (as contrasted to non-matching) visual feedback, mimicking involuntary hand movements evoked by TMS. We show that the illusory embodiment occurred when TMS pulses were temporally matched with VR feedback, but not when TMS was administered outside primary motor cortex, (over the vertex) or when stimulating motor cortex at a lower intensity (that did not activate peripheral muscles). Behavioural (questionnaires) and neurophysiological (motor-evoked-potentials, TMS-evoked-movements) measures further indicated that embodiment was not explained by stimulation per se, but depended on the temporal coherence between TMS-induced activation of hand corticospinal representation and the virtual bodily feedback. This reveals that non-invasive brain stimulation may replace the application of external tactile hand cues and motor components related to volition, planning and anticipation.
Mots-clé
hand corticospinal tract, ownership, rubber hand illusion, transcranial magnetic stimulation, virtual reality
Pubmed
Web of science
Open Access
Oui
Création de la notice
23/04/2018 17:38
Dernière modification de la notice
30/04/2021 7:08
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