Figure 1. FitzHugh-Nagumo and Hindmarsh-Rose neural models.

(A) The intrinsic dynamics of a neuron according to FitzHugh-Nagumo model. Two trajectories in the phase space (left) and their corresponding time series (right) are represented. (B) Hindmarsh-Rose model: the constant parameters used are: (a = 1; b = 3; c = 1; d = 5; s = 4; r = 0.006; x ₀ = −1.6). Different dynamic behavior is obtained for different values of the parameter I.