Studies in the last decades have contributed to the understanding that the EEG signal outside the classical frequency band, ranging from 0.3 to 70 Hz, contains important information. High-frequency oscillations (HFOs) are defined as EEG events in the frequency range between 80 and 500 Hz, consisting of oscillations that stand out from the EEG background activity.1–3 HFOs are subdivided into ripples (80–250 Hz) and fast ripples (FRs) (>250 Hz).3–5
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Cendes et al. (2018) studied this question.
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