Information dynamics of in silico EEG Brain Waves: Insights into oscillations and functions
Fig 5
Neuronal activity ρ features across the (μ, τrec) parameter space.
The white solid line on the left shows a second-order phase transition from a silent to an active state (AT). The white dashed line shows the emergence of an explosive first-order transition. The region between dashed lines is a meta-stable phase, as described in [24]. (A) Temporal average of excitatory and inhibitory neuronal activity 〈ρ〉: The region between the second-order and first-order transitions shows what appears to be a low activity intermediate phase (II.a), which gives place to a full active phase of high activity (II.b) for noise values μ > 5. (B) Temporal variance of excitatory and inhibitory neuronal activity: The inhibitory population shows complex activity patterns along the phase space with clear regions of high temporal variability of its activity (in phase II.b), whereas the excitatory population has, in general, low temporal variability in its activity along the phase space. (C) Temporal variance of Boolean states (X) of neurons: The maximum variance (gray region) appears to mark the transition line between the low activity intermediate phase II.a and the high activity phase II.b. Note that this finding occurs for both the excitatory and inhibitory neuronal populations.