Ultrafast EEG frequencies - Not to be neglected in the future

E. Niedermeyer, D. L. Sherman

Research output: Contribution to journalArticlepeer-review


The customarily recorded EEG frequency range of 0.3-80 Hz can be rather easily extended to 500 or even 1000 Hz. The study of such ultrafast frequencies provides new insights into epileptic activities and also into physiological conditions. The realtionship between ultrafast epileptic "ripples" in the 100 to 400 Hz range (and other superfast patterns) to classical spikes may demonstrate a new landscape of paroxysmal manifestations. This might be also true for physiological activities. Our personal experiences on ultrafast activities are based upon rats with pentylenetetrazol-induced seizures. An EEG view enriched with ultrafast frequencies may lead to a rapprochement of EEG and evoked potentials since there is also an ultrafast component in EPs. The recording of the ultrafast component will gradually become a part of clinical EEG work. Joining forces with basic EEG researchers will be needed in order deepen our understanding of the significance of ultrafast activities. This is just another entrance gate into the 21st century.

Original languageEnglish (US)
Pages (from-to)192-198
Number of pages7
JournalNeurodiagnostic Journal
Issue number3
StatePublished - Jan 1 2001


  • EEG frequencies
  • In epilepsy
  • In physiological conditions
  • Relationship to EP
  • Relationship to neuronal activity
  • Ultrafast EEG

ASJC Scopus subject areas

  • Clinical Neurology
  • Medical Laboratory Technology


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