Time-frequency effects for reward predicting cues.

<p>SPM-based analyses across all sensors and time-points revealed main effects of drug group (levodopa, placebo) at left parietal sensors in the low beta band (peak at 434 ms; nearest sensor: MLP54) (A) and left frontal sensors for the high beta band (peak at 558 ms; nearest sensor: MLF64) following cue presentation (D). Both effects were driven by lower beta power in the levodopa group compared to the placebo group (C and F). Left columns show statistical parametric maps of the F-statistics, middle columns show the time-frequency plots as extracted from the nearest channel, and right columns show the effects for each condition at the peak time point as extracted from voxel space. Dashed boxes in B and E indicate the low (13–20 Hz) and high (20–30 Hz) beta band, respectively. Error bars in C and F denote one standard error of the mean (SEM).