Figure 21.

A, Coexistence of SLEs and RSE. The simulations are performed without noise. SLEs and a stable LC coexist for m = −0.5 and x₀ = −1.6 ($I_{ex{t}_2}=0$). SLEs occur through a fold/Hopf bifurcation. The arrows indicate the direction of trajectories. For easier visualization, we plot generalized coordinates (X, Y) corresponding to ($-10x_1+x_2,\hspace{0.17em}5y_1$) for seizures (top) and to ($-0.3x_1+x_2,\hspace{0.17em}0.06y_1$) for LC (bottom). LC is characteristic of RSE. B, C, Time series of SLEs (B) and LC (C). Parameter settings correspond to region IX in Figure 34 and to region 14 in Figure 35. A, Top, I.C = [0 −5 3 0 0 0.01], T_s = [0 220], and r  =  0.01. A, Bottom, I.C = [4 −1 −0.5 0 0 0.01], T_s = [0 120], and r  =  0.01. The coexistence of LC and S can be found in area II [Fig. 12B].