Figure 1

Plots of firing rate function. Intercepts of y = F(W₀ a) with a straight line y = a determine homogeneous fixed points. (a) Piecewise linear rate function (Equation 2.3) showing the existence of an unstable fixed point at a = 0 and a stable fixed point at a = κ. (b) Sigmoidal rate function F(a) = 2/(1 + e^-2[a-κ]) showing the existence of two stable fixed points separated by an unstable fixed point.