Fig. 3

The four different parameter regimes using the parameter values given in Table 1. Illustrated are the survivor distribution functions, ${\overline{G}}_{{\varphi }_m}(t)$, for representative ${\varphi }_m=2\pi /\Omega \times \{0,0.25,0.5,0.75\}$. Varying ${\varphi }_m$ has, for the most part, the effect of shifting the curves laterally, while varying α, β, γ changes their characteristic form. a supra-threshold, b supersinusoidal, c critical, d subthreshold