Modeling neuronal avalanches and long-range temporal correlations at the emergence of collective oscillations: Continuously varying exponents mimic M/EEG results
Fig 2
Neuronal avalanches and order parameter definitions.
(A) A neuronal avalanche starts and ends when the fluctuations of the integrated network activity cross a threshold θ. The size of an avalanche can be defined as sg, the total number of spikes, or sθ, the number of spikes minus the threshold value. The avalanche duration T is the time that the fluctuations stay above θ. (B) Detail of the power spectrum around the region where a peak appears. The order parameter φ is given by the ratio between the power peak area ϕp and the total area ϕp + ϕu. Red symbols represent the frequencies that bound the φ area: fmin(diamond), fpeak(circle) and fmax (triangle).