Abnormal EEG | Abnormal electroencephalogram | Alpha or Beta wave disappeared | Alpha or bete wave disappeared | Disorder EEG (NOS) | EEG abnormal | Electroencephalogram abnormal | Nonspecific abnormal electroencephalogram (EEG) | Rhythmic small waves decreased | Wave slowing | EEG provocation test positive | EEG ground activity abnormal | EEG ground activity decreased | EEG photoparoxysmal response |