FitzHugh-Nagumo: Excitable Pulse Propagation (v2)
1D reaction-diffusion model of nerve impulse propagation — excitation, refractory period, recovery
Parameters
Excitability ε:
0.08
Recovery rate γ:
0.8
External bias β:
0.7
Diffusion D
u
:
1.0
Fire Pulse (click canvas)
Reset
View: Space-Time
FitzHugh (1961), Nagumo (1962):
u_t = D∇²u + u(1−u)(u−a) − v
v_t = ε(u − γv − β)
u = membrane voltage, v = recovery. Pulse propagation requires D>0; wave speed c∝√(Du·ε).
Pulses: 0