Effect of skull resistivity on the spatial resolutions of EEG and MEG

IEEE Transactions on Bio-medical Engineering
Jaakko Malmivuo, V Suihko

Abstract

The resistivity values of the different tissues of the head affect the lead fields of electroencephalography (EEG). When the head is modeled with a concentric spherical model, the different resistivity values have no effect on the lead fields of the magnetoencephalography (MEG). Recent publications indicate that the resistivity of the skull is much lower than what was estimated by Rush and Driscoll. At the moment, this information on skull resistivity is, however, slightly controversial. We have compared the spatial resolution of EEG and MEG for cortical sources by calculating the half-sensitivity volumes (HSVs) of EEG and MEG as a function of electrode and magnetometer distance, respectively, with the relative skull resistivity as a parameter. Because the spatial resolution is related to the HSV, these data give an overview of the effect of these parameters on the spatial resolution of both techniques. Our calculations show that, with the new information on the resistivity of the skull, in the spherical model for cortical sources the spatial resolution of the EEG is better than that of the MEG.

References

Jan 1, 1969·IEEE Transactions on Bio-medical Engineering·S Rush, D A Driscoll
Mar 1, 1997·IEEE Transactions on Bio-medical Engineering·J MalmivuoH Eskola
Nov 15, 2000·IEEE Transactions on Bio-medical Engineering·T F OostendorpD F Stegeman

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Citations

Jul 17, 2007·Annals of Biomedical Engineering·R J Sadleir, A Argibay
Jan 15, 2008·Medical & Biological Engineering & Computing·Juho VäisänenJari Hyttinen
Dec 5, 2012·ISRN Neurology·Madoka YamazakiDon M Tucker
Jul 30, 2009·Computational Intelligence and Neuroscience·Katrina WendelRolando Grave de Peralta Menendez
Jul 22, 2009·Journal of Physiology, Paris·Outi Väisänen, Jaakko Malmivuo
Sep 21, 2004·IEEE Transactions on Bio-medical Engineering·Outi R M RyynänenJaakko A Malmivuo
Aug 25, 2015·Journal of Neuroscience Methods·Jasmine SongDon Tucker
Oct 28, 2008·Brain Research·Phan LuuDon M Tucker
Jan 1, 2020·Micromachines·Diqing SuJian-Ping Wang
Apr 26, 2019·Frontiers in Neurology·Christoph M Michel, Denis Brunet
Feb 21, 2021·Seizure : the Journal of the British Epilepsy Association·Ricardo Lutzky SauteJoao Pereira Leite

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