Table I.

Characteristics of patients: clinical, anatomical MRI, and EEG features

Pts	Age (year)	Epilepsy type	Age of seizure onset (year)	Anatomical MRI	Seizure semiology	EEG pattern of usual seizures	Interictal EEG	iEEG
1	22	FLE	11	N	Two types: (1) GTC; (2) Absences with staring and unresponsiveness during 30s.	Bursts of sharp and slow wave discharges followed by low voltage fast activity seen diffusely over both hemispheres. Postictal rhythmic biF sharp and slow wave discharges with L predominance.	BiF sharp and slow wave discharges during sleep; LT spikes; bursts of bil fast activity during sleep (with a L predominance).	None
2	29	LTPE	18	N	Déjà vu, anxiety, and palpitations followed by dysphasia and staring. Duration 30 s.	10 Hz rhythmic sharp wave discharges over the L T areas followed by amplitude increase and reduced frequency.	LT spikes.	None
3	19	RTPOLE	13	N	Distortion of the L visual field (sometimes R side also) sometime associated with a loss of consciousness, left eyes deviation and tongue movements. Postictal headache.	10 Hz rhythmic R TPO sharp activity followed by secondary generalization.	R TPO spikes	None
4	26	Bil TOLE	9	Band heterotopia predominating over P, O, and T, R > L	Chest pressure feeling followed by loss of contact, staring, chewing, and sometimes R eyes deviation.	Bil post T (R predominance) slow waves followed by rhythmic fast activity and irregular generalized slow waves.	Bil TO (R predominance) spike and slow waves complexes.	None
5	23	TOLE	13	Band heterotopia predominating over the bil F and P regions.	Visual illusions, micropsia followed by blindness or sees lights forming faces.	Prolonged EEG seizures, maximal over post temporal regions with a R predominance	Synchronous and rhythmic sharp‐and‐slow wave discharges over post head regions.	None
6	20	R TPE	14	Complex MCD over the R TPO with large heterotopic gray matter nodules and abnormal overlying cortex.	Visual distortion with color change, followed by confusion.	Brief rhythmic 5 Hz discharges over R TP areas	R TP sharp waves or spikes.	Depth electrodes: regional post T and PO onset.
7	11	RFLE	5	R ant. F suspected focal cortical dysplasia.	Sensation of fear followed by a deep breath movement, sometimes followed by a scream and head turn to the L.	Prolonged bursts of rhythmic bil F spike‐waves with a clear R predominance.	R F spikes.	Preoperative ECoG: R frontopolar and interhemispheric grids. R F rhythmic spikes.
8	68	RFLE	1 month before	Single metastasis in the R post SMA	L eyelids clonus followed by jerks of the four limbs.	Bursts of R F slow waves followed by a generalized rhythmic discharge.	—	None
9	42	FCTE	9	R F atrophy, L TP and R T trepanation	During night only, slow head and chest flexion followed by L arm extension and R head deviation (5 s).	Bil FC rhythmic sharp wave activity.	R FC slow waves	None
10	36	FTLE	4	L FT atrophy	In the childhood: R body weakness post meningoencephalitis. Two types: 1. Drop attacks. 2. Head and eyes deviation to the L, dystonic posturing of the L arm.	Generalized depression then rhythmic slow waves and spikes on the R side. In postictal R rhythmic slow waves.	Generalized slow waves, polysharp‐slow waves over the R electrodes, sometimes more over the FT convexity.	ECoG: Strips located over the LFT convexity: technical problem with two of four grids. Absence of early focal left hemisphere discharge during seizures.

Patients are ordered according to the type of brain lesion. R, right; L, left; Bil, bilateral; T, temporal; F, frontal; C, central; P, parietal; O, occipital; N, normal; MCD, malformation of cortical development; Max, maximum; ECoG, electrocorticography.