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Figure 2: Non-invasive electroencephalogram (EEG) and positron emission tomography (PET) of Patient 3. (a) Inter-ictal regular scalp EEG showed high sharp waves in the right frontal lobe. Reference voltage was 100 μV/cm. (b) PET scan revealed marked hypometabolism in the right frontal lobe. (c and d) 18-channel scalp video EEG recordings. The patient experienced no seizure attack during the recording period, but sharp waves and slow waves can be found in the right frontal lobe, which was concordant with findings in the regular scalp EEG and PET scan. Reference voltage was 150 μV/cm. Electrodes were positioned according to the 10-20 system

Figure 2: Non-invasive electroencephalogram (EEG) and positron emission tomography (PET) of Patient 3. (a) Inter-ictal regular scalp EEG showed high sharp waves in the right frontal lobe. Reference voltage was 100 μV/cm. (b) PET scan revealed marked hypometabolism in the right frontal lobe. (c and d) 18-channel scalp video EEG recordings. The patient experienced no seizure attack during the recording period, but sharp waves and slow waves can be found in the right frontal lobe, which was concordant with findings in the regular scalp EEG and PET scan. Reference voltage was 150 μV/cm. Electrodes were positioned according to the 10-20 system