Figure 2.

Electroencephalogram during wakefulness demonstrates paroxysmal generalized 0.5-1 Hz spike-and-wave and polyspike-and-wave discharges of approximately 3-4 seconds duration and up to 600 μV of amplitude with maximum electronegativity in both frontocentral regions (F3-C3>F7-T3>T5/F4-C4>F8-T4>T6). This response is replicated during intermittent photic stimulation at low frequencies (1 Hz). These discharges are time-locked with involuntary and arrhythmic movements involving the tongue, lips, and left upper and lower extremities.. Montage type: average; Recording speed: 30 mm/s; Sensitivity (also known as [aka] “gain”): 30 μV/mm; High-frequency filter: 70 Hz; Low-frequency filter: 1 Hz; Notch filter: 50 Hz cutoff frequency. The interval between 2 continuous vertical lines is equivalent to 1 second.