Fig. 3.

Stimulus-locked lateralized readiness potential (LRP) waveforms. Time point zero denotes the stimulus presentation. Stimulus locked LRPs are shown for healthy controls in blue and for Gilles de la Tourette patients (GTS) in red. Standard deviations are represented by shaded areas in pale blue for healthy controls and pale red for GTS. Purple represents the overlap between the groups. The analyzed time window of the correct response activation (220 ms – 420 ms) is marked with horizontal brackets. For the topography plots, difference waves were created between the contralateral and ipsilateral sides in the motor element overlap and in the no motor element overlap conditions separately in the two groups. The scalp topography plots show the distribution of the mean activity of the contralateral-ipsilateral difference waves of the time window of correct response activation. Panel A presents the motor element overlap condition, panel B the no motor element overlap condition. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)