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- W4214805476 abstract "Rhythmical cortical activity has long been recognized as a pillar in the architecture of brain functions. Yet, the dynamic organization of its underlying neuronal population activity remains elusive. Here we uncover a unique organizational principle regulating collective neural dynamics associated with the alpha rhythm in the awake resting-state. We demonstrate that cascades of neural activity obey attenuation-amplification dynamics (AAD), with a transition from the attenuation regime—within alpha cycles—to the amplification regime—across a few alpha cycles—that correlates with the characteristic frequency of the alpha rhythm. We find that this short-term AAD is part of a large-scale, size-dependent temporal structure of neural cascades that obeys the Omori law: Following large cascades, smaller cascades occur at a rate that decays as a power-law of the time elapsed from such events—a long-term AAD regulating brain activity over the timescale of seconds. We show that such an organization corresponds to the waxing and waning of the alpha rhythm. Importantly, we observe that short- and long-term AAD are unique to the awake resting-state, being absent during NREM sleep. These results provide a quantitative, dynamical description of the so-far-qualitative notion of the waxing and waning phenomenon, and suggest the AAD as a key principle governing resting-state dynamics across timescales." @default.
- W4214805476 created "2022-03-05" @default.
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- W4214805476 date "2022-03-04" @default.
- W4214805476 modified "2023-09-28" @default.
- W4214805476 title "Alpha rhythm induces attenuation-amplification dynamics in neural activity cascades" @default.
- W4214805476 doi "https://doi.org/10.1101/2022.03.03.482657" @default.
- W4214805476 hasPublicationYear "2022" @default.
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