Table 1.

Subject information.

	Age	Sex	Handedness	Grid location	Strip and depth electrodes location	Seizure onset
S1	47	F	Right	64-contact grid right frontal	3*6-contact strip right prefrontal; 2*4-contact strip fronto-orbital; 3*4-contact strips interhemispheric	Right dorso-lateral prefrontal
S2	46	M	Right	64-contact grid right temporo-frontal	2*12-contact and 1*4-contact strips right prefrontal lateral; 1*6-contact and 1*4 contact strips right fronto-basal; 3*4-contact strips interhemispheric	Cryptogenic
S3	50	M	Right	64-contact grid right fronto-lateral	2*4-contact strips right fronto-basal; 1*12-contact strip fronto-lateral; 4*4-contact strips interhemispheric	Right fronto-lateral