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• W3208968137 endingPage "118672" @default.
• W3208968137 startingPage "118672" @default.
• W3208968137 abstract "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." @default.
• W3208968137 created "2021-11-08" @default.
• W3208968137 creator A5001644142 @default.
• W3208968137 creator A5063636409 @default.
• W3208968137 date "2021-12-01" @default.
• W3208968137 modified "2023-10-17" @default.
• W3208968137 title "Cortical correlation structure of aperiodic neuronal population activity" @default.
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• W3208968137 doi "https://doi.org/10.1016/j.neuroimage.2021.118672" @default.
• W3208968137 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34715318" @default.
• W3208968137 hasPublicationYear "2021" @default.
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