Computer Analysis of the Telemetered EEG in the Study of Epilepsy and Schizophrenia

  • J. R. Stevens
Conference paper
Part of the Acta Neurochirurgica book series (NEUROCHIRURGICA, volume 23)


As has long been appreciated, significant abnormalities of electrical activity in the deep structures of the brain are often entirely undetectable in the scalp EEG. Because of medical risks and ethical objections associated with the introduction of intracerebral electrodes in the study of patients with generalized epilepsy, behaviour disorders and psychoses, we have sought to develop non-invasive methods for localization of the subcortical EEG abnormalities in patients with these diagnoses. Two techniques which use episodic disturbances in behaviour to examine EEG power spectra associated with periods of abnormal and normal behaviour have been developed in our laboratory: 1. the sorting of averaged brief epochs of EEG spectra on the basis of normal or pathologically prolonged reaction time; 2. correlation of power spectra from 24 hours telemetered EEG with clinical seizures and during normal and abnormal behaviours in patients with epilepsy and schizophrenia, respectively.


Power Spectrum Schizophrenic Patient Spike Activity Normal Control Subject Chronic Schizophrenia 
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Copyright information

© Springer-Verlag 1976

Authors and Affiliations

  • J. R. Stevens
    • 1
  1. 1.University of Oregon Medical SchoolPortlandUSA

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