[Eeglablist] Eye artefact identification via ICA without EOG channels

Makoto Miyakoshi mmiyakoshi at ucsd.edu
Wed Dec 9 16:58:19 PST 2015

Dear Clemens,

>the EOG channels do not seem to add substantially  more information with
regards to blink occurrences.

I agree with you. My understanding is that ICA captures blinks so easily
that even without EOG channels it can do the job perfectly. I compared 33ch
vs. reduced-to-3ch data (the latter contains the same Fz, Cz, and Pz of the
former) and run ICA separately. In both decompositions, the first IC was
eye blink, and their ERPimages were identical (except for scale)!


On Tue, Dec 8, 2015 at 12:40 AM, Clemens DICKHUT <clemens.dickhut at uni.lu>

> Dear EEG experts,
> I am going to record EEG using a 64 channel ActiCap. Additionally, I could
> use bipolar channels to keep track of (V/H)EOG. These would not have a
> common reference with the scalp electrodes. After running several pilot
> tests with and without EOG, the EOG channels do not seem to add
> substantially  more information with regards to blink occurrences. Frontal
> scalp electrodes seem to identify these reliably as well.
> As the ICA in my case is based on only scalp electrodes, would you regard
> it as o.k. practice recording the EEG without further EOG underpinning?
> What are your experiences? I am happy to hear from you guys.
> Best,
> Clemens
>   P.S.: in case of double post, sorry, but I think my first request did
> not get through.
> _______________________________
> Clemens Dickhut, M.Sc., (PhD Student)
> Institute for Health and Behaviour
> Research Unit INSIDE
> University of Luxembourg - Campus Belval
> Maison des Sciences Humaines
> 11, Porte des Sciences, R. 04 415
> L-4366 Esch-sur-Alzette
> Tel.: (+352) 46 66 44 9536
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Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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