[Eeglablist] EOG channels included in ICA and DIPFIT

[Makoto Miyakoshi]

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> 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)?
>
> 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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