Fig. 2

Solutions of Equations 1 and 2 at one instant in time. $V_i$ (top) and $s(V_i)$ (bottom) as functions of $I_{\mathrm{app}}^i$, $N=101$. This shows a state where all neurons are active (see Figure 1). If the network was switching from active to quiescent or vice versa, there would be a steep ‘front’ where the $V_i$ changed rapidly with i although they would still form a continuous curve.