Distance of the electrode contacts to the suspected epileptogenic zone.

Plotted are the histograms and kernel density estimates of distances of contacts with detected seizure activity, with non-group TAA instances, and with group TAA instances. For the purpose of this figure, we considered the epileptogenic zone to be located at the contact pair with the highest calculated Epileptogenicity index (EI) [27]. Note however that the EI was calculated only for some seizures (25.4%); for others we used the EI from other seizure in the same subject (54.4%), and yet other seizures where EI was not available for the subject were excluded from this analysis (20.1%). Results indicate that the contacts with the group and non-group TAA instance follow the same distribution of distances as all seizing contacts.

(PDF)