Figure 1: Waveforms of NoGo potentials in control (a), Case 1 during uncontrolled seizures (b), and Case 1 during with controlled seizures but abnormal EEG findings (c). ERPs during NoGo task (blue lines), Go task (red lines) and differential waves of NoGo and Go (green lines) are shown. In control, NoGoN2 (yellow area) clearly appeared at Fz and Cz around 230 ms, and NoGoP3 (blue arrowhead) was dominant at Cz around 320 ms (a). In contrast, NoGoN2 and NoGoP3 in the patient were unclear during intractable seizures, but GoP3 (red arrowhead) was elicited at Pz around 380 ms, although latency was delayed compared to control. However, after treatment, all waves in Case 1 were improved during periods of controlled seizures, although amplitudes were still diminished (c).