New method for analysing sensitivity distributions of electroencephalography measurements

Medical & Biological Engineering & Computing
Juho VäisänenJari Hyttinen

Abstract

In this paper, we introduce a new modelling related parameter called region of interest sensitivity ratio (ROISR), which describes how well the sensitivity of an electroencephalography (EEG) measurement is concentrated within the region of interest (ROI), i.e. how specific the measurement is to the sources in ROI. We demonstrate the use of the concept by analysing the sensitivity distributions of bipolar EEG measurement. We studied the effects of interelectrode distance of a bipolar EEG lead on the ROISR with cortical and non-cortical ROIs. The sensitivity distributions of EEG leads were calculated analytically by applying a three-layer spherical head model. We suggest that the developed parameter has correlation to the signal-to-noise ratio (SNR) of a measurement, and thus we studied the correlation between ROISR and SNR with 254-channel visual evoked potential (VEP) measurements of two testees. Theoretical simulations indicate that source orientation and location have major impact on the specificity and therefore they should be taken into account when the optimal bipolar electrode configuration is selected. The results also imply that the new ROISR method bears a strong correlation to the SNR of measurement and can thus be ap...Continue Reading

References

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Citations

Jun 18, 2009·Medical & Biological Engineering & Computing·Dean Cvetkovic, Irena Cosic
Feb 5, 2010·Computational Intelligence and Neuroscience·Katrina WendelJaakko Malmivuo
Jul 22, 2009·Journal of Physiology, Paris·Outi Väisänen, Jaakko Malmivuo
Aug 1, 2009·IEEE Transactions on Bio-medical Engineering·Jesús Requena-CarriónJosé Luis Rojo-Alvarez
Apr 26, 2017·Frontiers in Human Neuroscience·Martin G Bleichner, Stefan Debener
Feb 28, 2008·Medical & Biological Engineering & Computing·Juho VäisänenJari Hyttinen
May 8, 2020·Journal of Neural Engineering·Sarah BlumStefan Debener

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