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  Hybrid-type synchronization transitions: Where incipient oscillations, scale-free avalanches, and bistability live together

Buendia, V., Villegas, P., Burioni, R., & Muñoz, M. (2021). Hybrid-type synchronization transitions: Where incipient oscillations, scale-free avalanches, and bistability live together. Physical Review Research, 3(2): 023224. doi:10.1103/PhysRevResearch.3.023224.

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Buendia, V1, Author                 
Villegas, P, Author
Burioni, R, Author
Muñoz, MA, Author
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1External Organizations, ou_persistent22              

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 Abstract: The human cortex is never at rest but in a state of sparse and noisy neural activity that can be detected at broadly diverse resolution scales. It has been conjectured that such a state is best described as a critical dynamical process—whose nature is still not fully understood—where scale-free avalanches of activity emerge at the edge of a phase transition. In particular, some works suggest that this is most likely a synchronization transition, separating synchronous from asynchronous phases. Here, by investigating a simplified model of coupled excitable oscillators describing the cortex dynamics at a mesoscopic level, we investigate the possible nature of such a synchronization phase transition. Within our modeling approach we conclude that—in order to reproduce all key empirical observations, such as scale-free avalanches and bistability, on which fundamental functional advantages rely—the transition to collective oscillatory behavior needs to be of an unconventional hybrid type, with mixed features of type-I and type-II excitability, opening the possibility for a particularly rich dynamical repertoire.

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 Dates: 2021-06
 Publication Status: Issued
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 Identifiers: DOI: 10.1103/PhysRevResearch.3.023224
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Title: Physical Review Research
Source Genre: Journal
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Publ. Info: College Park, Maryland, United States : American Physical Society (APS)
Pages: 18 Volume / Issue: 3 (2) Sequence Number: 023224 Start / End Page: - Identifier: ISSN: 2643-1564
CoNE: https://pure.mpg.de/cone/journals/resource/2643-1564