Figure 7.
Sensory Stimulation and Self-Generated Behavior Transiently Deviate the Brain’s Dynamical State from Criticality
(A–D) The average rate of avalanche initiation (A), the average avalanche size (B), and the average power exponents of the distribution of avalanche sizes (C) and durations (D) were calculated for avalanches included within sliding time windows, for all spontaneous and evoked segments and all datasets. Shaded areas indicate SEM. We compared the values during periods of spontaneous activity (black horizontal line) and during periods of visual stimulation (gray horizontal line) using a two-sided Wilcoxon rank-sum test (p, p value). We also compared the values measured in all windows during spontaneous activity using a RM-ANOVA; pA indicates the resulting p value (high p values suggest that avalanche properties were constant during periods of spontaneous activity).
(E and F) Averaged exponents describing the distributions of durations (E) and sizes (F) of spontaneous neuronal avalanches around self-generated tail movement onsets. Exponents were normalized by the corresponding averaged values during the reference periods (from –100 to –10 s and from +10 to +100 s, shaded areas; with respect to movement onsets, white areas).
(G and H) Averaged changes of the Kullback-Leibler divergence (KLD) between the distributions of durations (G) and sizes (H) of spontaneous avalanches and theoretical power laws (relative to reference periods).
In (E)–(H), ∗p < 0.001, two-sample t test comparing values at movement onset and values in the absence of movements.
See also Figures S6 and S7.