Figure 2.

The windowed power spectra (WPS) for the two ECoG time-series shown in figure 1. Here, subfigures (a) and (b) correspond to the time-series X and Y in figure 1, respectively. The WPS are plotted in logarithmic greyscale with black and white denoting regions of high power (greater than 30 μV²) and low power (less than 0.03 μV²), respectively. The vertical line in the figure at t=17.5 s denotes the approximate onset of seizure.