[Eeglablist] EOG channels included in ICA and DIPFIT

Arnaud Delorme arno at ucsd.edu
Wed May 10 09:22:34 PDT 2017


Dear Alessio,

Yes, include the EOG channels but as long as they have the same reference as the scalp channels. Otherwise, do not include them.
Best wishes,

Arno

> On May 10, 2017, at 7:33 AM, Makoto Miyakoshi <mmiyakoshi at ucsd.edu> wrote:
> 
> Dear Alessio,
> 
> Getting back to you after 3 month!
> 
> > how to deal with ICs where EOG contributes for example for 20%, or 40%, or 60%?
> 
> This is a good question.
> Usually EOG is decomposed well, so the result is rather black and white. You can reduce it by optimizing settings (using proper preprocessing and parameters.) 
> 
> However, sometimes this mixture of brain EEG and non-brain artifact happens. In this case, you are forced to choose either false positive (include them) or false negative (exclude them). I tend to include them. If you exclude them, you typically find no frontal ICs.
> 
> Makoto
> 
> 
> 
> 
> On Sun, Feb 12, 2017 at 1:31 AM, Alessio Matiz <muec at inbox.com <mailto:muec at inbox.com>> wrote:
> Very dear EEGLAB-list,
> 
> is it correct to fit dipoles (via DIPFIT2-plugin) to ICs that have been found including EOG channel in the ICA decomposition (as Arno suggested in https://sccn.ucsd.edu/pipermail/eeglablist/2007/001801.html <https://sccn.ucsd.edu/pipermail/eeglablist/2007/001801.html>)?
> 
> From my datasets I removed ICs where EOG channel contributes for >90% of IC power (considering them artifactual ICs), but how to deal with ICs where EOG contributes for example for 20%, or 40%, or 60%?
> 
> Thanks,
> Alessio
> 
> 
> 
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> 
> 
> -- 
> Makoto Miyakoshi
> Swartz Center for Computational Neuroscience
> Institute for Neural Computation, University of California San Diego
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