Fig. 4.

Time series of alpha (7–13Hz) power for all four conditions averaged across subjects for the source and STNr both ON and OFF dopaminergic medication. The time series are baseline-corrected from − 8 to − 5 s prior to movement and the changes are shown as percentage changes from baseline. Time series have been smoothed by a 500 ms FWHM Gaussian kernel. The power changes were subjected to statistical analysis, separately for the STNr and source.