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Phase-Plane Trajectories of EEG Seizure Patterns in Epilepsy

STS Instructor Authored by Thomas Collura

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Check out this Knowledge Base article from StressTherapy Solutions: Phase-Plane Trajectories of EEG Seizure Patterns in Epilepsy.

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Study at a glance

Area
Epilepsy & Seizures
Study type
Observational study
Authors
Collura TF, Morris HH, Burgess RC, Jacobs EC, Klem GH
Journal
American Journal of EEG Technology
Year
1992
Participants
60 seizures
Protocol
phase-plane analysis of video-EEG seizure recordings

Key findings

  • 60 seizures analysed from scalp and intracranial recordings
  • Phase-plane plots made repetitive waves and inter-channel phase relationships easy to see
  • Seizure onset and its time course could be traced with this display
  • Offers an alternative set of criteria for sorting interictal and ictal EEG

DOI 10.1080/00029238.1992.11080420 →

Researchers plotted EEG signals as phase-plane trajectories (a way of drawing a signal against its own rate of change) to study the shift from normal between-seizure activity into seizures. Recordings came from scalp and implanted electrodes in patients on prolonged video-EEG monitoring, and 60 seizures were examined. The plots highlighted repeating waveforms and timing relationships between channels, letting the evolution of seizure onset be followed and offering new criteria for classifying EEG patterns.