| Texto completo | |
| Autor(es): Mostrar menos - |
Lotfi, Nastaran
;
Fontenele, Antonio J.
;
Feliciano, Thais
;
Aguiar, Leandro A. A.
;
de Vasconcelos, Nivaldo A. P.
;
Soares-Cunha, Carina
;
Coimbra, Barbara
;
Rodrigues, Ana Joao
;
Sousa, Nuno
;
Copelli, Mauro
;
Carelli, Pedro, V
Número total de Autores: 11
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW E; v. 102, n. 1, p. 9-pg., 2020-07-27. |
| Resumo | |
It has recently been reported that statistical signatures of brain criticality, obtained from distributions of neuronal avalanches, can depend on the cortical state. We revisit these claims with a completely different and independent approach, employing a maximum entropy model to test whether signatures of criticality appear in urethane-anesthetized rats. To account for the spontaneous variation of cortical states, we parse the time series and perform the maximum entropy analysis as a function of the variability of the population spiking activity. To compare data sets with different numbers of neurons, we define a normalized distance to criticality that takes into account the peak and width of the specific heat curve. We found a universal collapse of the normalized distance to criticality dependence on the cortical state, on an animal by animal basis. This indicates a universal dynamics and a critical point at an intermediate value of spiking variability. (AU) | |
| Processo FAPESP: | 13/07699-0 - Centro de Pesquisa, Inovação e Difusão em Neuromatemática - NeuroMat |
| Beneficiário: | Oswaldo Baffa Filho |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |