Localization of Epileptogenic Foci Using a Simple Reference Subtraction Montage to Document Small Interchannel Time Differences

Prasanna Jayakar, Michael S. Duchowny, Trevor J. Resnick, Luis A. Alvarez

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

We present a modified EEG montage that detects small interchannel time differences and assists in localizing the epileptogenic focus. Regions with apparently synchronous epileptic discharges are displayed simultaneously in referential and subtraction derivations. The subtraction derivation is a bipolar configuration of two regions of interest that are not necessarily adjacent. The referential derivation reveals the polarity, voltage, and morphology of the two discharges, and the subtraction derivation detects asynchrony; the combined reference-subtraction derivation thus indicates the region that is activated first.

Original languageEnglish (US)
Pages (from-to)212-215
Number of pages4
JournalJournal of Clinical Neurophysiology
Volume8
Issue number2
DOIs
StatePublished - Apr 1991

Keywords

  • Reference-subtractionmontage
  • Timedifferences

ASJC Scopus subject areas

  • Physiology
  • Neurology
  • Clinical Neurology
  • Physiology (medical)

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