Table 2.

Recording sites identified as the ictal onset zone by epileptologists vs. those indicated by SdDTF analysis of propagation of high frequency activity.

Patient	Seizure onset type	Number of seizures	Onset zone indicated by epileptologists	Onset zone indicated by high frequency propagation MTAF > 0.8 (ictal, preictal, inter-2, inter-1)	Onset zone indicated by high frequency propagation MTAF > 0.8 (inter-2)	Onset zone indicated by high frequency propagation MTAF > 0.8 (inter-1)	Surgical pathology Post-op outcome Duration follow up
Patient #1 (1^st admission)	focal	7	LOS2-LOS6	LOS3	LOS3	LOS3	no surgery N/A N/A
Patient #1 (2^nd admission)	focal	4	LPD1-LPD5^, LSP1-LSP5^	LPD3^*	LPD1^, LPD3^, LAD2^*	LPD3^*	DNET ILAE Class 1 3 years
Patient #2	focal	86	RPT2^, RPT6^	RPT2^*	N/A	N/A	MTS ILAE Class 1 9 years
Patient #3	widely distributed	5	RAT1-RAT4^, RBT1-RBT4^, RPT1-RPT4^*	NONE (highest - RAT1^, RBT3^)	N/A	N/A	MTS ILAE Class 1 5 years
Patient #4	focal	5	RA2-RA3^*	RA2^*	RA2^*	N/A	MTS ILAE Class 1 7 years
Patient #5	focal	9	DPB6-DPB8^*	DPB7^, DPB8^, LGD27^, LGD28^	DPB7^, DPB8^, LGD20^* LGD27^, LGD28^	DPB7^, DPB8^,	cortical dysgenesis ILAE Class 1 4 years
Patient #6	widely distributed	3	LFG33-LFG36^, LFG41-LFG43^	NONE (highest - LFG41^, LFG42^)	LFG47	LFG37	oligodendroglioma ILAE Class 5 4 years

Asterix indicates electrodes recording the tissue that was ultimately resected.

MP - matching pursuit

SdDTF - short-time direct directed transform function

Surgical outcome according to 2001 ILAE classification (Wieser et al., 2001).