Intrinsic dynamics of the STN neurons Eqs (1)–(3) without stimulation.

The raster plots (A) and (C) and firing rates (relative number of neurons firing a spike at a given time) in plots (B) and (D) illustrate the STN neuronal activity in a strongly synchronized regime (A), (B) with the coupling gG→S = 1.7 nS/μm2 from GPe to STN and in a weakly synchronized regime (C), (D) with gG→S = 1.28 nS/μm2. The red solid curves in plots (B) and (D) depict the filtered LFP. Stimulation current Istim = 0.