Fig. 3.

(A) Scalp maps showing mean ERSP for the anticipatory period (-1000 to 0 ms) at each of the 30 analyzed electrodes. The central electrodes C3 and C4 are indicated. (B) Continuous ERSP waveforms for the mu (8–13 Hz) ERSP at C3 (blue line) or C4 (red line) plotted from 1500 ms prior to tactile stimulus presentation (0 ms) and out to the following 300 ms. During the entire period plotted, the visual cue (directional arrow) is displayed. Mu rhythm desynchronization is indicated as negative ERSP values (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article).