5 papers
Statistical complexity is maximized close to criticality in cortical dynamics
Nastaran Lotfi, Thaís Feliciano, Leandro A. A. Aguiar +6
Complex systems are typically characterized as an intermediate situation between a complete regular structure and a random system. Brain signals can be studied as a striking exampl…
Anticipated synchronization in human EEG data: unidirectional causality with negative phase-lag
Francisco-Leandro P. Carlos, Maciel-Monteiro Ubirakitan, Marcelo Cairrão Araújo Rodrigues +6
Understanding the functional connectivity of the brain has become a major goal of neuroscience. In many situatons, the relative phase difference, together with coherence patterns,…
Subsampled directed-percolation models explain scaling relations experimentally observed in the brain
Tawan T. A. Carvalho, Antonio J. Fontenele, Mauricio Girardi-Schappo +6
Recent experimental results on spike avalanches measured in the urethane-anesthetized rat cortex have revealed scaling relations that indicate a phase transition at a specific leve…
Signatures of brain criticality unveiled by maximum entropy analysis across cortical states
Nastaran Lotfi, Antonio J. Fontenele, Thaís Feliciano +8
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 the…
Deterministic chaos in an ytterbium-doped mode-locked fiber laser
Lucas B. A. Mélo, Guillermo F. R. Palacios, Pedro V. Carelli +3
We experimentally study the nonlinear dynamics of a femtosecond ytterbium doped mode-locked fiber laser. With the laser operating in the pulsed regime a route to chaos is presented…