Jerk-locked back averaging and dipole source localization of magnetoencephalographic transients in a patient with epilepsia partialis continua

Hiroshi Shigeto, Shozo Tobimatsu, Takato Morioka, Tomoya Yamamoto, Takuro Kobayashi, Motohiro Kato

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

In order to localize the generator site of epilepfiform discharges, we applied the techniques of jerk-locked back averaging (JBA) of magnetoencephalographic (MEG) activities and dipole source localization in a patient with epilepsia partialis continua (EPC), who showed continuous, focal myoclonic jerks in the right arm. The myoclonic discharges in the right thenar muscle were used as a trigger pulse. JBA revealed consistent EEG and MEG transients that coincided consistently and constantly preceded the myoclonic jerks. The estimated dipoles of MEG were localized in a restricted area in the left precentral area, which closely correlated with the area of epileptic discharges recorded in electrocorticography. Therefore, JBA of MEG is considered to be a useful non-invasive method for localizing the epileptogenic area in EPC.

Original languageEnglish
Pages (from-to)440-444
Number of pages5
JournalElectroencephalography and Clinical Neurophysiology
Volume103
Issue number4
DOIs
Publication statusPublished - Oct 1 1997

All Science Journal Classification (ASJC) codes

  • Neuroscience(all)
  • Clinical Neurology

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