In your phase: neural phase synchronisation underlies visual imagery of faces

Abstract Mental imagery is the process through which we retrieve and recombine information from our memory to elicit the subjective impression of “seeing with the mind’s eye”. In the social domain, we imagine other individuals while recalling our encounters with them or modelling alternative social...

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Autores principales:	Andrés Canales-Johnson, Renzo C. Lanfranco, Juan Pablo Morales, David Martínez-Pernía, Joaquín Valdés, Alejandro Ezquerro-Nassar, Álvaro Rivera-Rei, Agustín Ibanez, Srivas Chennu, Tristan A. Bekinschtein, David Huepe, Valdas Noreika
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f313e81ed14d4237aca7814d383a1edc
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spelling	oai:doaj.org-article:f313e81ed14d4237aca7814d383a1edc2021-12-02T13:24:17ZIn your phase: neural phase synchronisation underlies visual imagery of faces10.1038/s41598-021-81336-y2045-2322https://doaj.org/article/f313e81ed14d4237aca7814d383a1edc2021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-81336-yhttps://doaj.org/toc/2045-2322Abstract Mental imagery is the process through which we retrieve and recombine information from our memory to elicit the subjective impression of “seeing with the mind’s eye”. In the social domain, we imagine other individuals while recalling our encounters with them or modelling alternative social interactions in future. Many studies using imaging and neurophysiological techniques have shown several similarities in brain activity between visual imagery and visual perception, and have identified frontoparietal, occipital and temporal neural components of visual imagery. However, the neural connectivity between these regions during visual imagery of socially relevant stimuli has not been studied. Here we used electroencephalography to investigate neural connectivity and its dynamics between frontal, parietal, occipital and temporal electrodes during visual imagery of faces. We found that voluntary visual imagery of faces is associated with long-range phase synchronisation in the gamma frequency range between frontoparietal electrode pairs and between occipitoparietal electrode pairs. In contrast, no effect of imagery was observed in the connectivity between occipitotemporal electrode pairs. Gamma range synchronisation between occipitoparietal electrode pairs predicted subjective ratings of the contour definition of imagined faces. Furthermore, we found that visual imagery of faces is associated with an increase of short-range frontal synchronisation in the theta frequency range, which temporally preceded the long-range increase in the gamma synchronisation. We speculate that the local frontal synchrony in the theta frequency range might be associated with an effortful top-down mnemonic reactivation of faces. In contrast, the long-range connectivity in the gamma frequency range along the fronto-parieto-occipital axis might be related to the endogenous binding and subjective clarity of facial visual features.Andrés Canales-JohnsonRenzo C. LanfrancoJuan Pablo MoralesDavid Martínez-PerníaJoaquín ValdésAlejandro Ezquerro-NassarÁlvaro Rivera-ReiAgustín IbanezSrivas ChennuTristan A. BekinschteinDavid HuepeValdas NoreikaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Andrés Canales-Johnson Renzo C. Lanfranco Juan Pablo Morales David Martínez-Pernía Joaquín Valdés Alejandro Ezquerro-Nassar Álvaro Rivera-Rei Agustín Ibanez Srivas Chennu Tristan A. Bekinschtein David Huepe Valdas Noreika In your phase: neural phase synchronisation underlies visual imagery of faces
description	Abstract Mental imagery is the process through which we retrieve and recombine information from our memory to elicit the subjective impression of “seeing with the mind’s eye”. In the social domain, we imagine other individuals while recalling our encounters with them or modelling alternative social interactions in future. Many studies using imaging and neurophysiological techniques have shown several similarities in brain activity between visual imagery and visual perception, and have identified frontoparietal, occipital and temporal neural components of visual imagery. However, the neural connectivity between these regions during visual imagery of socially relevant stimuli has not been studied. Here we used electroencephalography to investigate neural connectivity and its dynamics between frontal, parietal, occipital and temporal electrodes during visual imagery of faces. We found that voluntary visual imagery of faces is associated with long-range phase synchronisation in the gamma frequency range between frontoparietal electrode pairs and between occipitoparietal electrode pairs. In contrast, no effect of imagery was observed in the connectivity between occipitotemporal electrode pairs. Gamma range synchronisation between occipitoparietal electrode pairs predicted subjective ratings of the contour definition of imagined faces. Furthermore, we found that visual imagery of faces is associated with an increase of short-range frontal synchronisation in the theta frequency range, which temporally preceded the long-range increase in the gamma synchronisation. We speculate that the local frontal synchrony in the theta frequency range might be associated with an effortful top-down mnemonic reactivation of faces. In contrast, the long-range connectivity in the gamma frequency range along the fronto-parieto-occipital axis might be related to the endogenous binding and subjective clarity of facial visual features.
format	article
author	Andrés Canales-Johnson Renzo C. Lanfranco Juan Pablo Morales David Martínez-Pernía Joaquín Valdés Alejandro Ezquerro-Nassar Álvaro Rivera-Rei Agustín Ibanez Srivas Chennu Tristan A. Bekinschtein David Huepe Valdas Noreika
author_facet	Andrés Canales-Johnson Renzo C. Lanfranco Juan Pablo Morales David Martínez-Pernía Joaquín Valdés Alejandro Ezquerro-Nassar Álvaro Rivera-Rei Agustín Ibanez Srivas Chennu Tristan A. Bekinschtein David Huepe Valdas Noreika
author_sort	Andrés Canales-Johnson
title	In your phase: neural phase synchronisation underlies visual imagery of faces
title_short	In your phase: neural phase synchronisation underlies visual imagery of faces
title_full	In your phase: neural phase synchronisation underlies visual imagery of faces
title_fullStr	In your phase: neural phase synchronisation underlies visual imagery of faces
title_full_unstemmed	In your phase: neural phase synchronisation underlies visual imagery of faces
title_sort	in your phase: neural phase synchronisation underlies visual imagery of faces
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/f313e81ed14d4237aca7814d383a1edc
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In your phase: neural phase synchronisation underlies visual imagery of faces

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