Localization of Epileptogenic Foci Using a Simple Reference-Subtraction Montage to Document Small Interchannel Time Differences
- 1 April 1991
- journal article
- research article
- Published by Wolters Kluwer Health in Journal Of Clinical Neurophysiology
- Vol. 8 (2) , 212-215
- https://doi.org/10.1097/00004691-199104000-00009
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.Keywords
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