Fig 11. Impact of the pulsatile delayed feedback stimulation on the weakly coupled neuronal ensemble Eqs (1)–(3).

The time-averaged order parameter 〈R(t)〉 of the stimulated STN neurons is depicted in color ranging from 0 (blue) to 1 (red) versus the feedback delay τ and the stimulation intensity K for a weakly coupled regime (g_G→S = 1.28 nS/μm²). The stimulation signal consists of a pulse train of the charge-balanced biphasic pulses of type D [Fig 8D] modulated by (A) the LDF signal Eq (6) and (B) NDF signal Eq (7). The white curves in plots (A) and (B) are the boundaries of the largest continuous desynchronization regions from Figs 9D and 10D, respectively, and given for comparison. Pulse width PW = 0.5 ms.