John Libbey Eurotext

Diagnosing Lennox-Gastaut syndrome in an adult and its direct impact in epilepsy care Volume 24, issue 4, August 2022

Figure 1.

Routine EEG shows slow generalized spike-and-wave discharges: bipolar (upper panel) and referential (lower panel) montages show 100-300 µV, 2-2.5 Hz generalized (poly)spike-and-wave discharges (sensitivity: 15 µV/mm, LF: 1 Hz, HFF: 70 Hz, notch off).

Figure 2.

Routine EEG shows generalized paroxysmal fast activity: bipolar (upper panel) and referential (lower panel) montages show a 6-to-7-second run of 100-200 µV, 15-25 Hz generalized, sharply contoured activity without clinical manifestations, consistent with generalized paroxysmal fast activity (GPFA) (sensitivity: 15 µV/mm, LF: 1 Hz, HFF: 70 Hz, notch off).