Figure 2
From: Robust dynamical invariants in sequential neural activity
Definition and variability analysis of temporal intervals considered in this study to characterize the CPG cycle-by-cycle rhythm. Central panel: Scheme of the definition of the measured time intervals. Left and right panels: Boxplots of the coefficient of variation for the six measures in control conditions (darker color) and under the influence of ethanol (lighter hue boxes). Mean values (black dots) are displayed on top of each box. Left panel: Quantification of the variability in long recordings for preparations that were regular in control conditions (\(N\) = 12). The coefficients of variation are small (4–15%) in control conditions. Under the influence of ethanol, in lighter colored boxes, there is a large increase in variability for \(B{D}_{PD}\) (\(\mathrm{88 \% }\)), \(LPPD\,delay\) (\(\mathrm{80 \% }\)) and \(PDLP\,delay\) (\(\mathrm{124 \% }\)) while \(B{D}_{LP}\) is more restricted in variability (\(\mathrm{40 \% }\)). Right panel: Intrinsically irregular preparations (\(N\) = 4). One can observe an increase in variability of \(LPPD\,delay\) and \(LPPD\,interval\) due to the irregular hyperpolarization intervals in control conditions (see Fig. 1). After applying ethanol, there is even larger variability in \(B{D}_{PD}\) (\(\mathrm{130 \% }\)), \(PDLP\,interval\) (67–84%) and \(LPPD\,delay\) (\(\mathrm{79 \% }\)) while \(B{D}_{LP}\) variability remains more restricted (\(\mathrm{36 \% }\)).
