Fig. 2.

Default basal ganglia state for the tonic cortical input (3 Hz) in the resting state and normal DA level $\varphi =0.3$. Colors: parts, associated with DP (green), while parts, related to IP (red). Populations: $X=$ D1 (SPN), D2 (SPN), STN, GP, and SNr. Raster plots of spikes and IPSRs (instantaneous population spike rates) $R_X(t)$ of a1 D1 SPN, a2 D2 SPN, a3 STN, a4 GP, and a5 SNr cells. b Population-averaged mean firing rates (MFRs) $⟨f_i^{(X)}⟩$ of D1 SPN, D2 SPN, STN, GP, and SNr) cells. c Time-averaged synaptic currents for DP ($\overline{I_{\mathit{DP}}}$) and IP ($\overline{I_{\mathit{IP}}}$). Inset shows the excitatory and the inhibitory components of the IP current, $\overline{I_{\mathit{IP}}^{(E)}}$ and $\overline{I_{\mathit{IP}}^{(I)}}$. (d) Strengths of DP (${\mathcal{S}}_{\mathit{DP}}$) and IP (${\mathcal{S}}_{\mathit{IP}}$). The competition degree ${\mathcal{C}}_d(={\mathcal{S}}_{\mathit{DP}}/{\mathcal{S}}_{\mathit{IP}})=0.99$. (Color figure online)