Computed EEG Topography — Theory, Implementation and Application

  • Richard N. Harner
Part of the Ettore Majorana International Science Series book series (EMISS, volume 7)


Taken at first glance, the EEG appears to be merely a mixture of sinusoids ranging in frequency from 1 to 30 Hz with variations in frequency, phase relation and amplitude that are a function of the scalp location from which they are recorded, the state of activity of the subject and the state of the underlying brain. When a normal subject is maintained in the same state of activity repeated samples of more than 15–20 seconds in duration will lead to similar frequency distributions and similar amplitude statistics within a single channel. It is this predictable stability of the EEG signal that allows the estimation of altered states of activity related to altered function or disease.


Slow Wave Background Activity Alpha Activity Slow Activity Sharp Wave 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Plenum Press, New York 1981

Authors and Affiliations

  • Richard N. Harner
    • 1
  1. 1.Department of NeurologyGraduate HospitalPhiladelphiaUSA

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