--- res: bibo_abstract: - Physical and biological systems often exhibit intermittent dynamics with bursts or avalanches (active states) characterized by power-law size and duration distributions. These emergent features are typical of systems at the critical point of continuous phase transitions, and have led to the hypothesis that such systems may self-organize at criticality, i.e. without any fine tuning of parameters. Since the introduction of the Bak-Tang-Wiesenfeld (BTW) model, the paradigm of self-organized criticality (SOC) has been very fruitful for the analysis of emergent collective behaviors in a number of systems, including the brain. Although considerable effort has been devoted in identifying and modeling scaling features of burst and avalanche statistics, dynamical aspects related to the temporal organization of bursts remain often poorly understood or controversial. Of crucial importance to understand the mechanisms responsible for emergent behaviors is the relationship between active and quiet periods, and the nature of the correlations. Here we investigate the dynamics of active (θ-bursts) and quiet states (δ-bursts) in brain activity during the sleep-wake cycle. We show the duality of power-law (θ, active phase) and exponential-like (δ, quiescent phase) duration distributions, typical of SOC, jointly emerge with power-law temporal correlations and anti-correlated coupling between active and quiet states. Importantly, we demonstrate that such temporal organization shares important similarities with earthquake dynamics, and propose that specific power-law correlations and coupling between active and quiet states are distinctive characteristics of a class of systems with self-organization at criticality.@eng bibo_authorlist: - foaf_Person: foaf_givenName: Fabrizio foaf_name: Lombardi, Fabrizio foaf_surname: Lombardi foaf_workInfoHomepage: http://www.librecat.org/personId=A057D288-3E88-11E9-986D-0CF4E5697425 orcid: 0000-0003-2623-5249 - foaf_Person: foaf_givenName: Jilin W.J.L. foaf_name: Wang, Jilin W.J.L. foaf_surname: Wang - foaf_Person: foaf_givenName: Xiyun foaf_name: Zhang, Xiyun foaf_surname: Zhang - foaf_Person: foaf_givenName: Plamen Ch foaf_name: Ivanov, Plamen Ch foaf_surname: Ivanov bibo_doi: 10.1051/epjconf/202023000005 bibo_volume: 230 dct_date: 2020^xs_gYear dct_isPartOf: - http://id.crossref.org/issn/2100-014X dct_language: eng dct_publisher: EDP Sciences@ dct_title: Power-law correlations and coupling of active and quiet states underlie a class of complex systems with self-organization at criticality@ ...