Fig. 5.

Time–frequency images of coherence, averaged across subjects, for each of the four conditions OFF and ON dopaminergic medication. The coherence spectra have been smoothed by a 2D Gaussian kernel (FWHM of 2.5Hz and 500 ms). We used a baseline period from − 8 to − 5 s prior to movement with coherence changes reported as percentage change from this. Movement related changes dominate in the alpha band.