Hi,
I think there is a paper by Robert (Oostenveld & Praamsta, Clin
Neurophys 2001;112:713-719) and Roberts Thesis, which discuss what to do
instead of digitizing each single electrode location. From my own
experience I would say, that shifting single electrodes randomly does
not do so much if you seek to fit single dipoles. However, if you try to
estimate minimum source solutions you can be surprised. My
interpretation is that minimum norm solutions much more degress of
freedom than the dipole fit. Or in other words, a single dipole model is
more stiff and may smoothen out amplitude variations introduced by
spatial mislocations.
Best wishes,
Burkhard
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Dr. Burkhard Maess
Max Planck Institute for Human Cognitive and Brain Sciences
Stephanstr. 1a, P.O. Box 500355, D-04303 Leipzig
Aussenstelle Bennewitz, phone/fax: +49(3425)887525-26/-11
mail: maess 'at' cbs.mpg.de, http://www.cbs.mpg.de
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