Correlation between intra- and extracranial background EEG

Jonas Duun-Henriksen*, Troels W. Kjaer, Rasmus E. Madsen, Line S. Remvig, Carsten E. Thomsen, Helge B.D. Sorensen

*Corresponding author af dette arbejde

    Publikation: Bidrag til bog/antologi/rapportKonferencebidragForskningpeer review

    Abstrakt

    Scalp EEG is the most widely used modality to record the electrical signals of the brain. It is well known that the volume conduction of these brain waves through the brain, cerebrospinal fluid, skull and scalp reduces the spatial resolution and the signal amplitude. So far the volume conduction has primarily been investigated by realistic head models or interictal spike analysis. We have set up a novel and more realistic experiment that made it possible to compare the information in the intra- and extracranial EEG. We found that intracranial EEG channels contained correlated patterns when placed less than 30 mm apart, that intra- and extracranial channels were partly correlated when placed less than 40 mm apart, and that extracranial channels probably were correlated over larger distances. The underlying cortical area that influences the extracranial EEG is found to be up to 45 cm2. This area is larger than previously reported.

    OriginalsprogEngelsk
    Titel2012 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2012
    Sider5198-5201
    Antal sider4
    DOI
    StatusUdgivet - 14 dec. 2012
    Begivenhed34th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS 2012 - San Diego, CA, USA
    Varighed: 28 aug. 20121 sep. 2012

    Publikationsserier

    NavnProceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS
    ISSN (Trykt)1557-170X

    Konference

    Konference34th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS 2012
    Land/OmrådeUSA
    BySan Diego, CA
    Periode28/08/121/09/12

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