abnormal brain wave pattern abnormal brain alpha wave pattern 2025-02-14T19:55:23Z abnormal alpha oscillations the precise range covered by each band varies slightly depending on species any anomaly in the standard pattern of rhythmic and rapid fluctuation of electrical potential in the 8-12 or 13 Hz range between parts of the brain, often visualized on an electroencephalogram (EEG) MP:0014621 abnormal alpha waveform