[Eeglablist] Some basic questions about ICA

Makoto Miyakoshi mmiyakoshi at ucsd.edu
Wed Jan 29 11:12:39 PST 2014


Dear Kris,

> 1. For the ICA decomposition, does it matter if the electrode locations
are correct?

No it does not matter.

> 2. Is it a good idea to always include the eye / ecg channels in the ICA
decomposition?

Yes.

Makoto


2014-01-29 Kristoffer Aberg <kc.aberg at gmail.com>

> Hi,
> thanks for a wonderful toolbox!
>
> I will try to use ICA to remove blinks / eye-movement / ECG artifacts, but
> i have some questions i would be very happy if someone could address:
>
> 1. For the ICA decomposition, does it matter if the electrode locations
> are correct? That is, would the decomposition work even if the locations
> would be completely randomized? I ask because i dont know where to place
> the eye / ecg electrodes exactly.
>
> 2. Is it a good idea to always include the eye / ecg channels in the ICA
> decomposition? I ask because i thought to decompose data based on scalp
> electrodes only and then verify blink / pulse components by comparing them
> to the eye / ecg channels. When should i not include the eye / ecg channels
> in the ICA decomposition?
>
> Thanks for your time and your responses!
>
> Kris
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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