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Fronto-Parietal Brain Responses to Visuotactile Congruence in an Anatomical Reference Frame

Spatially and temporally congruent visuotactile stimulation of a fake hand together with one’s real hand may result in an illusory self-attribution of the fake hand. Although this illusion relies on a representation of the two touched body parts in external space, there is tentative evidence that, f...

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Autores principales: Limanowski, Jakub, Blankenburg, Felix
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5845128/
https://www.ncbi.nlm.nih.gov/pubmed/29556183
http://dx.doi.org/10.3389/fnhum.2018.00084
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author Limanowski, Jakub
Blankenburg, Felix
author_facet Limanowski, Jakub
Blankenburg, Felix
author_sort Limanowski, Jakub
collection PubMed
description Spatially and temporally congruent visuotactile stimulation of a fake hand together with one’s real hand may result in an illusory self-attribution of the fake hand. Although this illusion relies on a representation of the two touched body parts in external space, there is tentative evidence that, for the illusion to occur, the seen and felt touches also need to be congruent in an anatomical reference frame. We used functional magnetic resonance imaging and a somatotopical, virtual reality-based setup to isolate the neuronal basis of such a comparison. Participants’ index or little finger was synchronously touched with the index or little finger of a virtual hand, under congruent or incongruent orientations of the real and virtual hands. The left ventral premotor cortex responded significantly more strongly to visuotactile co-stimulation of the same versus different fingers of the virtual and real hand. Conversely, the left anterior intraparietal sulcus responded significantly more strongly to co-stimulation of different versus same fingers. Both responses were independent of hand orientation congruence and of spatial congruence of the visuotactile stimuli. Our results suggest that fronto-parietal areas previously associated with multisensory processing within peripersonal space and with tactile remapping evaluate the congruence of visuotactile stimulation on the body according to an anatomical reference frame.
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spelling pubmed-58451282018-03-19 Fronto-Parietal Brain Responses to Visuotactile Congruence in an Anatomical Reference Frame Limanowski, Jakub Blankenburg, Felix Front Hum Neurosci Neuroscience Spatially and temporally congruent visuotactile stimulation of a fake hand together with one’s real hand may result in an illusory self-attribution of the fake hand. Although this illusion relies on a representation of the two touched body parts in external space, there is tentative evidence that, for the illusion to occur, the seen and felt touches also need to be congruent in an anatomical reference frame. We used functional magnetic resonance imaging and a somatotopical, virtual reality-based setup to isolate the neuronal basis of such a comparison. Participants’ index or little finger was synchronously touched with the index or little finger of a virtual hand, under congruent or incongruent orientations of the real and virtual hands. The left ventral premotor cortex responded significantly more strongly to visuotactile co-stimulation of the same versus different fingers of the virtual and real hand. Conversely, the left anterior intraparietal sulcus responded significantly more strongly to co-stimulation of different versus same fingers. Both responses were independent of hand orientation congruence and of spatial congruence of the visuotactile stimuli. Our results suggest that fronto-parietal areas previously associated with multisensory processing within peripersonal space and with tactile remapping evaluate the congruence of visuotactile stimulation on the body according to an anatomical reference frame. Frontiers Media S.A. 2018-03-05 /pmc/articles/PMC5845128/ /pubmed/29556183 http://dx.doi.org/10.3389/fnhum.2018.00084 Text en Copyright © 2018 Limanowski and Blankenburg. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Neuroscience
Limanowski, Jakub
Blankenburg, Felix
Fronto-Parietal Brain Responses to Visuotactile Congruence in an Anatomical Reference Frame
title Fronto-Parietal Brain Responses to Visuotactile Congruence in an Anatomical Reference Frame
title_full Fronto-Parietal Brain Responses to Visuotactile Congruence in an Anatomical Reference Frame
title_fullStr Fronto-Parietal Brain Responses to Visuotactile Congruence in an Anatomical Reference Frame
title_full_unstemmed Fronto-Parietal Brain Responses to Visuotactile Congruence in an Anatomical Reference Frame
title_short Fronto-Parietal Brain Responses to Visuotactile Congruence in an Anatomical Reference Frame
title_sort fronto-parietal brain responses to visuotactile congruence in an anatomical reference frame
topic Neuroscience
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5845128/
https://www.ncbi.nlm.nih.gov/pubmed/29556183
http://dx.doi.org/10.3389/fnhum.2018.00084
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