Figure 3
From: Lag synchronization of coupled time-delayed FitzHugh–Nagumo neural networks via feedback control

(a) Without control synchronization dynamics of the recovery variable states (y-states) of different time-delayed unidirectional FHN networks without noise. (b) Controlled synchronized error dynamics of the recovery variable states (y-states) of different time-delayed unidirectional FHN neuronal networks without noise.