Distinct criticality of phase and amplitude dynamics in the resting brain

被引：26

作者：

Daffertshofer, Andreas ^{[1
,2
]}

Ton, Robert ^{[1
,2
,6
]}

Kringelbach, Morten L. ^{[3
]}

Woolrich, Mark ^{[4
,5
]}

Deco, Gustavo ^{[6
,7
]}

机构：

[1] Vrije Univ Amsterdam, Fac Behav & Movement Sci, Inst Brain & Behav Amsterdam, Boechorststr 9, NL-1081 BT Amsterdam, Netherlands

[2] Vrije Univ Amsterdam, Fac Behav & Movement Sci, Amsterdam Movement Sci, Boechorststr 9, NL-1081 BT Amsterdam, Netherlands

[3] Univ Oxford, Univ Dept Psychiat, Oxford OX3 7JX, England

[4] Univ Oxford, Oxford Ctr Human Brain Act, Oxford, England

[5] Univ Oxford, Nuffield Dept Clin Neurosci, Oxford Ctr Funct MRI Brain, Oxford, England

[6] Univ Pompeu Fabra, Computat Neurosci Grp, Ctr Brain & Cognit, Carrer Tanger 122-140, Barcelona 08018, Spain

[7] Univ Pompeu Fabra, ICREA, Carrer Tanger 122-140, Barcelona 08018, Spain

来源：

NEUROIMAGE | 2018年 / 180卷

基金：

欧盟地平线“2020”; 英国惠康基金;

关键词：

Power laws; Criticality; DFA; Amplitude; Phase; RANGE TEMPORAL CORRELATIONS; FUNCTIONAL CONNECTIVITY; NEURONAL AVALANCHES; CORTICAL NETWORKS; SPATIAL-PATTERNS; EEG DATA; MEG; INFORMATION; STATE; MODEL;

D O I：

10.1016/j.neuroimage.2018.03.002

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

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 sourcereconstructed 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.

引用

页码：442 / 447

页数：6

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