Figure 4. Z− PCs have more regular SS trains than do Z− PCs.

Plots of the SD (A) and CV (B) of the ISI distributions for SS trains from Z+ and Z− PCs. Analogous plots for the zonal data are shown in (C) and (D). In each plot data the circles represent values from individual PCs, the horizontal lines show the medians of the various distributions, and the boxes indicate the interquartile ranges.