NDLI: Mapping EEG-potentials on the surface of the brain: A strategy for uncovering cortical sources

Content Provider	Springer Nature Link
Author	Junghöfer, Markus Elbert, Thomas Leiderer, Paul Berg, Patrick Rockstroh, Brigitte
Copyright Year	1997
Abstract	This paper describes a uniform method for calculating the interpolation of scalp EEG potential distribution, the current source density (CSD), the cortical potential distribution (cortical mapping) and the CSD of the cortical potential distribution. It will be shown that interpolation and deblurring methods such as CSD or cortical mapping are not independent of the inverse problem in potential theory. Not only the resolution but also the accuracy of these techniques, especially those of deblurring, depend greatly on the spatial sampling rate (i.e., the number of electrodes). Using examples from simulated and real (64 channels) data it can be shown that the application of more than 100 EEG channels is not only favourable but necessary to guarantee a reasonable accuracy in the calculations of CSD or cortical mapping. Likewise, it can be shown that using more than 250 electrodes does not improve the resolution.
Starting Page	203
Ending Page	217
Page Count	15
File Format	PDF
ISSN	08960267
Journal	Brain Topography
Volume Number	9
Issue Number	3
e-ISSN	15736792
Language	English
Publisher	Kluwer Academic Publishers-Human Sciences Press
Publisher Date	1997-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	High spatial sampling EEG Spatial deblurring Current source density Cortical Mapping Spherical spline interpolation Inverse problem Neurosciences Neurology Psychiatry
Content Type	Text
Resource Type	Article
Subject	Neurology Anatomy Radiology, Nuclear Medicine and Imaging Neurology (clinical) Radiological and Ultrasound Technology

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