Table 2.

Synopsis of pathological findings at first rsEEG

Pt. ID	Phenotype	Age	Background rhythm	Intermittent slowing (frequency range)	Continuous slowing (frequency range)	Bilateral or generalized	Lateralized (R/L)	Regional (F/C/T/P/O)	IEDs
1-I	FHM1	56	A	T/D		Bilateral		FT
1-II	FHM1	42	A	D/T		Non lateralized/bilateral	L > R	T
1-III	FHM1	58	A	D/T			L
1-IV	FHM1	11	A	T		Bilateral		FT
2-I	EA2	28	A	T/D		Generalized
2-II	EA2	37	A	D/T		Generalized
3-II	FHM1	47	A	T/D		Bilateral		T
3-V	FHM1	10	A	T/D			L	TP
3-VII	FHM1	11	A	T/D			L	T
4-II	EA2	54	A	T		Generalized
4-III	EA2	15	A	T/D		Generalized			yes
4-V	EA2	26	A	D/T		Non lateralized/bilateral	L > R	T	yes
4-VI	EA2	3	T			Generalized			yes
5-I	EA2	22	A	T		Bilateral		T
6-I	FHM1	6	D		D		R	FT
9-I	EA2	18	A	T		Bilateral		T
10-I	EA2	41	A	D/T		Generalized
12-I	EA2	41	A	T		Generalized
13-I	EA2	52	A	D/T		Non lateralized/bilateral	L > R	T
14-I	FHM1	41	A	T			R	T
16-I	EA2	64	A	T/D		Non lateralized/bilateral	L > R	T

Concerning frequencies: A alpha, T theta, D delta; concerning localization: L and R = left and right hemispheres respectively, F = frontal, C = central, T = temporal, P = parietal, and O = occipital regions. IEDs: intermittent epileptic discharges. When both T and D frequencies were detected, the one that recurred most in EEG is reported after the slash. The slowing can occur continuously or intermittently; it can be generalized, bilateral or lateralized. In case of bilateral slowing, the presence of a side difference is also reported (for example L > R). Bilateral or lateralized slowing can also affect specifically one or two lobes (regional slowing)