[Eeglablist] running ICA - with or without ocular channels?
mmiyakoshi at ucsd.edu
Thu Jun 29 17:08:57 PDT 2017
Sorry for belated response.
I detailed my description a little bit upon your question.
- Include EOG and other channels as long as they share a reference
electrodes with scalp (exploratory) electrodes. If EOG channels are
referenced to each other as bipolar, exclude them.
I did not understand what you mean by this
> Since to obtain EOG channels we do a subtraction the reference doesn't
matter anymore, right? It is cancelled-out. So I'm not sure what reference
Makoto is referring to,
Anyway, to confirm my point again, include EOG channels UNLESS they are
bipolar-referenced to each other.
On Sat, Mar 11, 2017 at 1:59 AM, José Luis <joseluisulloafulgeri at gmail.com>
> I'm trying to run ICA, and I just looked at Makoto's preprocessing
> pipeline advising to include EOG channels as long as they are referenced
> together. This is not very clear to me. We have recorded the typical 4
> channels to generate the EOG channels. When they are loaded we reference
> all channels to Cz, and then for these channels we proceed to subtraction
> to obtain vEOG and hEOG. Before ICA we re-reference all the other channels
> to average reference (not including the EOG channels). Since to obtain EOG
> channels we do a subtraction the reference doesn't matter anymore, right?
> It is cancelled-out. So I'm not sure what reference Makoto is referring to,
> My question stand, if I should include or not, both of my EOG channels for
> ICA. A priori I would think that including EOG would allow us to detect
> better ocular artefacts,
> Thanks for you help and advice in advance,
> José Luis ULLOA FULGERI, PhD
> +32477429007 <+32%20477%2042%2090%2007>
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Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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