Voltar

Seminário em Estatística acontece nesta quarta-feira (4)

Evento começa às 16h, na sala 11, no auditório Professor Ricardo de Carvalho Ferreira, no CCEN

O Programa de Pós-Graduação em Estatística promove, a partir das 9h desta quarta-feira (4), mais uma edição do Seminário de Estatística. Dessa vez, será abordado o tema “Criticality between cortical states” e o seminário será ministrado pelo professor Mauro Copelli Lopes da Silva, do Departamento de Física da própria UFPE. O evento começa às 16h, no auditório Professor Ricardo de Carvalho Ferreira, no CCEN*.

Resumo

Since the first measurements of neuronal avalanches, the critical brain hypothesis has gained traction. However, if the brain is critical, what is the phase transition? For several decades, it has been known that the cerebral cortex operates in a diversity of regimes, ranging from highly synchronous states (with higher spiking variability) to desynchronized states (with lower spiking variability). Here, using both new and publicly available data, we test independent signatures of criticality and show that a phase transition occurs in an intermediate value of spiking variability, in both anesthetized and freely moving animals. The critical exponents point to a universality class different from mean-field directed percolation. Importantly, as the cortex hovers around this critical point, the avalanche exponents follow a linear relation that encompasses previous experimental results from different setups and is reproduced by a model.


*Local e horário foram modificados

Data da última modificação: 03/09/2019, 16:24