Fig. 4.

Average nearest neighbor correlations for electrode pairs inside the SOZ of patients with epilepsy, bridging between the SOZ and outside, outside the SOZ, and in the control patients. The frequency bands are those in Fig. 3. Bridging connections have significantly lower correlations over a range of frequency bands (δ, β, and γ) compared with those inside the SOZ, outside the SOZ in the δ, θ, α, β frequency bands, and in control brain for δ, θ, α, β, and γ frequency bands. Although there was a trend for increased correlations inside the SOZ compared with outside and for control brain, this did not reach significance. Brackets with * and ** indicate significantly different mean values at (P > 0.05) and (P > 0.01) with a Mann-Whitney rank sum test.