Weak Quasiperiodic Signal Propagation through Multilayer Feed-Forward Hodgkin–Huxley Neuronal Network

Figure 2

Contour plot of firing ratio r in the A-f plane. The firing rate r is obtained by counting firing times c during signal period and then divided by the number of periods, i.e., . External periodic signal with large amplitude A and low frequency f triggers the firing activity of neurons more frequently. For a given frequency f, firing ratio r increases monotonically with increasing amplitude A. But for a given amplitude A, the dependence of firing ratio r on the increasing frequency f shows nonmonotonic change. Here, σ takes value of 0.