Fig. 6.

Time series of alpha (7–13Hz) cortical source–STNr coherence averaged across subjects, separately for ON and OFF medication. Changes are shown relative to the baseline from − 8 to − 5 s prior to movement for all conditions and subjects. Time series have been smoothed by a 500 ms FWHM Gaussian kernel. Upper panel pair: Temporal–STNr coherence. Note that the significant main effect of medication, given by the dark grey line, was due to coherence being greater OFF than ON medication. Lower panel pair: M1–STNr coherence, where there are no significant changes.