Figure 3 shows significant increases in the regularity of the LFPs, as measured by AC, as a function of stimulus regularity in HG.
Figure 3B shows the increase in the autocorrelation value (ΔAC) of the LFP at a lag of 1/128 s, because of the transition between noise and RIN, as a function of stimulus regularity (as determined by the number of cycles of the delay-and-add algorithm that was used to construct the stimulus [ 2]).
The coefficient of variation of the ISIs, a value used widely as an indicator of regularity in point processes (Johnson 1996), was also calculated.
Given this, it was not possible to explore variations in accuracy as a function of the presence or absence of regularity (as per our first prediction).
We quantify active periods and regularity in Figure 4 for groups as a function of increasing number of central individuals.
The chronological analysis of root developmental profiles revealed a strong regularity in lateral root initiation rhythm expressed as a function of root length (expressed as a number of cells, Figure 2A).
Pitch-sensitive neurons in awake primate cortex are known to increase their discharge rate as a function of salience (where salience has been inferred from the temporal regularity of a click train or the number of iterations of IRN) (Bendor and Wang 2005).
Figure 7 summarizes the average firing frequency, regularity of firing and fraction of cells firing regularly as a function of age and genotype.
Quasi-regularity implies that if we know that a cell is located in one specific location P, then the density of cells of the same class as a function of the distance from P is initially low at small distances, increases to peak above the mean density, and then settles down to the mean density at large distances (Fig 1b).
As both entropy and RQA quantify the degree of regularity in the EEG signal, this may be a strong indication of an increase of EEG regularity as a general mechanism underlying anaesthesia-induced unconsciousness.
