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Neuromagnetic assessment of epileptogenicity in cerebral arteriovenous malformation.

PubMed

Authors: Morioka T, Nishio S, Hisada K, Shigeto H, Yamamoto T, Fujii K, Fukui M

Year

2000

Paper ID

13324

Status

Peer-reviewed

Abstract Read

~2 min

Abstract Words

130

Citations

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.

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Magnetoencephalographic (MEG) activities were recorded in five patients with cerebral arteriovenous malformation (AVM) who presented with epilepsy and no clinical history of...

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References & Citation Signals

[1] DOI https://doi.org/10.1007/pl00011956 [2] Publisher https://pubmed.ncbi.nlm.nih.gov/11153549/

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