We divided the continuous EEG signals into consecutive segments s(t) of 23.6 s (4096 data points) and calculated the mean phase coherence R as a measure of the degree of phase synchrony (Mormann et al., 2000) from all artifact-free segments (using an automated artifact detection algorithm to exclude segments with signal saturation and steep transients) for every possible combination of electrode contacts x and y within the MTL of the hemisphere contralateral to the epileptic focus, resulting in a symmetrical 10 by 10 synchronization matrix {Rx,y}: Rx,y=|1N∑k=1Nexp i[ϕx(k⋅Δt)−ϕy(k⋅Δt)]| with N = 4096 and Δt denoting the sampling interval.
