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. Author manuscript; available in PMC: 2016 Aug 15.
Published in final edited form as: Respir Physiol Neurobiol. 2015 May 21;215:73–81. doi: 10.1016/j.resp.2015.05.009

Figure 5.

Figure 5

Long term temporal Poincaré variability (TPVA) in Pdi amplitude (normalized to spontaneous sighs) was determined by the variance of the centroid position of individual events over various window sizes from 1 to 20 during eupnea and hypoxia-hypercapnia. TPVA analysis allows for the changing dynamics of inspiratory event variability over time, specifically distributional variance and temporal correlations. Data analyzed by two-way ANOVA: interaction p = 0.969; main effect of window p < 0.001; main effect of behavior p = 0.354. *significantly different from window 1; †significantly different from window 5; ‡significantly different from window 15.