Quantifying Memory in Complex Physiological Time-Series
Figure 2
The probability distribution of the normalized exit times (τ) needed to observe an accelerating event that is ρ = 0.5σ second faster than a given point (t) within the time-series (ΔB = Bt+τ−Bt≤−0.5σ).
Respiratory inter-breath interval time-series were obtained from (a) 10 healthy volunteers, (b) 10 patients with controlled atopic asthma (CAA), (c) 10 patients with uncontrolled atopic asthma (UCAA) and (d) 10 patients with uncontrolled non-atopic asthma (UNAA). Blue solid lines represent probability distribution of τ of the original time-series and red dash-dot lines correspond to their shuffled time-series. Data are presented as mean ± standard error of mean.