Bilateral Rolandic operculum processing underlying heartbeat awareness reflects changes in bodily self-consciousness.

Détails

ID Serval
serval:BIB_32E2CADBA7AD
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Bilateral Rolandic operculum processing underlying heartbeat awareness reflects changes in bodily self-consciousness.
Périodique
The European journal of neuroscience
Auteur⸱e⸱s
Blefari M.L., Martuzzi R., Salomon R., Bello-Ruiz J., Herbelin B., Serino A., Blanke O.
ISSN
1460-9568 (Electronic)
ISSN-L
0953-816X
Statut éditorial
Publié
Date de publication
05/2017
Peer-reviewed
Oui
Volume
45
Numéro
10
Pages
1300-1312
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Résumé
Exteroceptive bodily signals (including tactile, proprioceptive and visual signals) are important information contributing to self-consciousness. Moreover, prominent theories proposed that visceral signals about internal bodily states are equally or even more important for self-consciousness. Neuroimaging studies have described several brain regions which process signals related to bodily self-consciousness (BSC) based on the integration of exteroceptive signals (e.g. premotor cortex, angular gyrus, supramarginal gyrus and extrastriate body area), and that another brain region, the insula/operculum which is involved in interoception and interoceptive awareness, processes signals critical for self-awareness. Providing evidence for the integration of exteroceptive and interoceptive bodily signals, recent behavioral experiments have demonstrated that the manipulation of interoceptive (e.g. cardiac) signals, coupled with exteroceptive (e.g. visual) signals, also modulates BSC. Does this integration occur within or outside the structures described above? To this end, we adapted a recently designed protocol that uses cardio-visual stimulation to induce altered states of BSC to fMRI. Additionally, we measured neural activity in a classical interoceptive task. We found six brain regions (bilateral Rolandic operculum, bilateral supramarginal gyrus, right frontal inferior operculum and left temporal superior gyrus) that were activated differently during the interoception task as opposed to a control task. The brain regions which showed the highest selectivity for BSC based on our cardio-visual manipulation were found in the bilateral Rolandic operculum. Given our findings, we propose that the Rolandic operculum processes integrated exteroceptive-interoceptive signals that are necessary for interoceptive awareness as well as BSC.

Mots-clé
Adult, Awareness, Body Image, Brain/physiology, Female, Heart Rate, Humans, Interoception, Magnetic Resonance Imaging, Male, Cardiac processing, high-resolution fMRI, interoception, multisensory integration
Pubmed
Web of science
Création de la notice
26/06/2017 18:12
Dernière modification de la notice
20/08/2019 14:18
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