Figure 1.

Experimental setting. (A) Participants performed a blocked motor task with 30 second periods of rest (when a red cue was presented at 2 Hz) interleaved with 30 second periods of thumb/finger movement (when a green cue was presented at 2 Hz). (B) Representative image of the preimplantation fMRI results showing a statistical t‐map of BOLD change during movement compared to rest. fMRI results were rendered on the cortical surface with a search depth of up to 8 mm below the cortical surface and are clearly visible on pre and post central gyri. For visualization, these maps were smoothed as shown in the middle panel. On the right panel, the estimated percentage of BOLD signal change per electrode is shown. (C) From the ECoG, electric potential power spectra were calculated for each electrode. Power spectra are shown for two electrodes on pre central (I) and post central (II) gyri that showed significant increases during movement in the high frequency band (HFB) from 65–95 Hz. During movement there were power decreases in low frequency bands (α, β1 and β2) and a broadband increase in the HFB. At 50 Hz the ambient “line” noise peak is visible. On the rendering, electrodes in green showed significant (P < 0.05, Bonferroni corrected over electrodes) HFB power increases.