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Neurosurgical Review

, Volume 23, Issue 4, pp 206–212 | Cite as

Neuromagnetic assessment of epileptogenicity in cerebral arteriovenous malformation

  • T. Morioka
  • S. Nishio
  • K. Hisada
  • H. Shigeto
  • T. Yamamoto
  • K. Fujii
  • M. Fukui
Original Article

Abstract 

Magnetoencephalographic (MEG) activities were recorded in five patients with cerebral arteriovenous malformation (AVM) who presented with epilepsy and no clinical history of intracranial hemorrhage, using a 37-channel DC superconducting quantum interference device (SQUID) system. While scalp-recorded electroencephalograms (EEG) failed to reveal paroxysmal discharge, MEGs demonstrated localized high frequency magnetic activity (HFMA). Magnetic source imaging (MSI) depicted the accumulation of equivalent current dipole (ECD) originating from HFMA around the nidus, and the ECD localization agreed well with spike localization on intraoperative electrocorticography (ECoG). These areas corresponded with the areas of hypoperfusion on single photon emission tomography and the intraoperative laser Doppler flow meter. We discussed the application of MEG in estimating interictal paroxysmal activity sources in patients with AVM and addressed the questions of its reliability and validity in source localization.

Keywords Arteriovenous malformation Magnetoencephalography Magnetic source imaging Electrocorticography 

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Copyright information

© Springer-Verlag Heidelberg 2000

Authors and Affiliations

  • T. Morioka
    • 1
  • S. Nishio
    • 1
  • K. Hisada
    • 1
  • H. Shigeto
    • 2
  • T. Yamamoto
    • 3
  • K. Fujii
    • 4
  • M. Fukui
    • 1
  1. 1.Department of Neurosurgery, Neurological Institute, Graduate School of Medicine, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan e-mail: takato@ns.med.kyushu-u.ac.jp Tel.: +81-92-642-5524, Fax: +81-92-642-5526JP
  2. 2.Department of Neurology, Neurological Institute, Graduate School of Medicine, Kyushu University, Fukuoka, JapanJP
  3. 3.Department of Otolaryngology, Graduate School of Medicine, Kyushu University, Fukuoka, JapanJP
  4. 4.Department of Neurosurgery, Kitasato University, Sagamihara, JapanJP

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