Distinct criticality of phase and amplitude dynamics in the resting brain

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• dc.contributor.author Daffertshofer, Andreas
• dc.contributor.author Ton, Robert
• dc.contributor.author Kringelbach, Morten L.
• dc.contributor.author Woolrich, Mark
• dc.contributor.author Deco, Gustavo
• dc.date.accessioned 2022-10-18T08:49:24Z
• dc.date.available 2022-10-18T08:49:24Z
• dc.date.issued 2018
• dc.description Includes supplementary materials for the online appendix.
• dc.description.abstract Converging research suggests that the resting brain operates at the cusp of dynamic instability, as signified by scale-free temporal correlations. We asked whether the scaling properties of these correlations differ between amplitude and phase fluctuations, which may reflect different aspects of cortical functioning. Using source-reconstructed magneto-encephalographic signals, we found power-law scaling for the collective amplitude and for phase synchronization, both capturing whole-brain activity. The temporal changes of the amplitude comprise slow, persistent memory processes, whereas phase synchronization exhibits less temporally structured and more complex correlations, indicating a fast and flexible coding. This distinct temporal scaling supports the idea of different roles of amplitude and phase fluctuations in cortical functioning.
• dc.description.sponsorship We would like to thank Michael Breakspear for the challenging discussion and the valuable contributions to this study. We received the following funding: GD, RT: ERC Advanced Grant: DYSTRUCTURE (n. 295129), GD: Spanish Research Project PSI2013-42091-P, Human Brain Project (n. H2020-720270), and FP7-ICT BrainScales (n. 269921). MLK: ERC Consolidator Grant CAREGIVING (n. 615539) and TrygFonden Charitable Foundation. MW: Wellcome Trust and an MRC UK MEG Partnership Grant (MR/K005464/1). AD: H2020-MSCA-ITN COSMOS (grant n. 642563).
• dc.format.mimetype application/pdf
• dc.identifier.citation Daffertshofer A, Ton R, Kringelbach ML, Woolrich M, Deco G. Distinct criticality of phase and amplitude dynamics in the resting brain. NeuroImage. 2018 Oct 15;180(Pt B):442-7. DOI: 10.1016/j.neuroimage.2018.03.002
• dc.identifier.doi http://dx.doi.org/10.1016/j.neuroimage.2018.03.002
• dc.identifier.issn 1053-8119
• dc.identifier.uri http://hdl.handle.net/10230/54463
• dc.language.iso eng
• dc.publisher Elsevier
• dc.relation.ispartof NeuroImage. 2018 Oct 15;180(Pt B):442-7
• dc.relation.projectID info:eu-repo/grantAgreement/EC/FP7/269921
• dc.relation.projectID info:eu-repo/grantAgreement/EC/H2020/642563
• dc.relation.projectID info:eu-repo/grantAgreement/EC/H2020/720270
• dc.relation.projectID info:eu-repo/grantAgreement/EC/FP7/615539
• dc.relation.projectID info:eu-repo/grantAgreement/EC/FP7/295129
• dc.relation.projectID info:eu-repo/grantAgreement/ES/1PE/PSI2013-42091-P
• dc.rights ©2018 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
• dc.rights.accessRights info:eu-repo/semantics/openAccess
• dc.rights.uri http://creativecommons.org/licenses/by/4.0/
• dc.subject.keyword Power laws
• dc.subject.keyword Criticality
• dc.subject.keyword DFA
• dc.subject.keyword Amplitude
• dc.subject.keyword Phase
• dc.title Distinct criticality of phase and amplitude dynamics in the resting brain
• dc.type info:eu-repo/semantics/article
• dc.type.version info:eu-repo/semantics/publishedVersion