The files of a total of 27 TLE patients (mean age 40 years, 41% male) were analyzed (for patient characteristics, see table 1 and 2). Surgical outcome after one year was documented according to the modified Engel scale [30]. Three patients showed artefacts in the ECoG recordings, which occurred in one channel (one patient) or two channels (two patients). These artefacts were caused by bad contacts between the grid and the temporal brain surface. The artefact channels were excluded from further analyses in these patients.
