Cortical correlation structure of aperiodic neuronal population activity

Electrophysiological population signals contain oscillatory and non-oscillatory aperiodic (1/frequency-like) components. So far research has largely focused on oscillatory activity, and only recently, interest in aperiodic population activity has gained momentum. Accordingly, while the cortical corr...

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Autores principales:	Andrea Ibarra Chaoul, Markus Siegel
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Human brain Neuronal coupling Oscillations Aperiodic 1/frequency MEG Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571
Acceso en línea:	https://doaj.org/article/2825c4b3151d474a8bba29a52499dc4f
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spelling	oai:doaj.org-article:2825c4b3151d474a8bba29a52499dc4f2021-11-04T04:26:43ZCortical correlation structure of aperiodic neuronal population activity1095-957210.1016/j.neuroimage.2021.118672https://doaj.org/article/2825c4b3151d474a8bba29a52499dc4f2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1053811921009459https://doaj.org/toc/1095-9572Electrophysiological population signals contain oscillatory and non-oscillatory aperiodic (1/frequency-like) components. So far research has largely focused on oscillatory activity, and only recently, interest in aperiodic population activity has gained momentum. Accordingly, while the cortical correlation structure of oscillatory population activity has been characterized, little is known about the correlation of aperiodic neuronal activity. To address this, we investigated aperiodic neuronal population activity in the human brain using resting-state magnetoencephalography (MEG). We combined source-analysis, signal orthogonalization and irregular-resampling auto-spectral analysis (IRASA) to systematically characterize the cortical distribution and correlation of aperiodic neuronal activity. We found that aperiodic population activity is robustly correlated across the cortex and that this correlation is spatially well structured. Furthermore, we found that the cortical correlation structure of aperiodic activity is similar but distinct from the correlation structure of oscillatory neuronal activity. Anterior cortical regions showed the strongest differences between oscillatory and aperiodic correlation patterns. Our results suggest that correlations of aperiodic population activity serve as robust markers of cortical network interactions. Furthermore, our results show that aperiodic and oscillatory signal components provide non-redundant information about large-scale neuronal correlations. This may reflect at least partly distinct neuronal mechanisms underlying and reflected by oscillatory and aperiodic neuronal population activity.Andrea Ibarra ChaoulMarkus SiegelElsevierarticleHuman brainNeuronal couplingOscillationsAperiodic1/frequencyMEGNeurosciences. Biological psychiatry. NeuropsychiatryRC321-571ENNeuroImage, Vol 245, Iss , Pp 118672- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Human brain Neuronal coupling Oscillations Aperiodic 1/frequency MEG Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571
spellingShingle	Human brain Neuronal coupling Oscillations Aperiodic 1/frequency MEG Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571 Andrea Ibarra Chaoul Markus Siegel Cortical correlation structure of aperiodic neuronal population activity
description	Electrophysiological population signals contain oscillatory and non-oscillatory aperiodic (1/frequency-like) components. So far research has largely focused on oscillatory activity, and only recently, interest in aperiodic population activity has gained momentum. Accordingly, while the cortical correlation structure of oscillatory population activity has been characterized, little is known about the correlation of aperiodic neuronal activity. To address this, we investigated aperiodic neuronal population activity in the human brain using resting-state magnetoencephalography (MEG). We combined source-analysis, signal orthogonalization and irregular-resampling auto-spectral analysis (IRASA) to systematically characterize the cortical distribution and correlation of aperiodic neuronal activity. We found that aperiodic population activity is robustly correlated across the cortex and that this correlation is spatially well structured. Furthermore, we found that the cortical correlation structure of aperiodic activity is similar but distinct from the correlation structure of oscillatory neuronal activity. Anterior cortical regions showed the strongest differences between oscillatory and aperiodic correlation patterns. Our results suggest that correlations of aperiodic population activity serve as robust markers of cortical network interactions. Furthermore, our results show that aperiodic and oscillatory signal components provide non-redundant information about large-scale neuronal correlations. This may reflect at least partly distinct neuronal mechanisms underlying and reflected by oscillatory and aperiodic neuronal population activity.
format	article
author	Andrea Ibarra Chaoul Markus Siegel
author_facet	Andrea Ibarra Chaoul Markus Siegel
author_sort	Andrea Ibarra Chaoul
title	Cortical correlation structure of aperiodic neuronal population activity
title_short	Cortical correlation structure of aperiodic neuronal population activity
title_full	Cortical correlation structure of aperiodic neuronal population activity
title_fullStr	Cortical correlation structure of aperiodic neuronal population activity
title_full_unstemmed	Cortical correlation structure of aperiodic neuronal population activity
title_sort	cortical correlation structure of aperiodic neuronal population activity
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/2825c4b3151d474a8bba29a52499dc4f
work_keys_str_mv	AT andreaibarrachaoul corticalcorrelationstructureofaperiodicneuronalpopulationactivity AT markussiegel corticalcorrelationstructureofaperiodicneuronalpopulationactivity
_version_	1718445261177487360

Cortical correlation structure of aperiodic neuronal population activity

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