Figure 2.

Flower garden (original origin choice). The spiral wave tip trajectories in physical space (x,y) for the FitzHugh–Nagumo model [Eq. 1] as a function of parameters ε and β. Phase was computed according to Eq. 2 and the instantaneous wave tip was identified using Eq. 3. The origin choice in Eq. 2 was (V^*=0, W^*=0).