PMC9674490_01
The scalp EEG shows poorly organized background with high amplitude slow waves/ multifocal random spike/ polyspike wave complexes (modified hypsarrhythmia pattern). 1A: Longitudinal bipolar montage (sensitivity-7 AmicroV), 1B: Ipsilateral ear reference montage.
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The interictal scalp EEG was done and had modified hypsarrhythmia during sleep (Fig. 1A & B).