the larger fluctuation, only trials with low baseline occupation could avoid exceeding bandwidth limit, resulting in the observed low PAC in non-freezing dual-task trials. (iii) Observed phenomenon: stimulation significantly reduced PAC while simultaneously improving freezing. The STIM-induced reduction of PAC was correlated with the STIM-induced improvement of freezing (Fig. 5). Reflected in the model: stimulation reduced baseline occupation, and whose reduction should be in accordance with the lowering of freezing probability when the dynamic fluctuation and bandwidth limit were kept generally constant. (iv) Observed phenomenon: STIM trials had lower freezing severity than NS trials even when under similar levels of PAC (Fig. 6). Reflected in the model: except for reducing baseline occupation, DBS improved FOG also through enhancing bandwidth limit.
