[Eeglablist] Removing EOG artefact using ICA and converting back to EEG channels
Arnaud Delorme
arno at salk.edu
Sun Mar 5 14:58:54 PST 2006
You may also use menu item "Tools > Remove components" to remove
artifact components from your data. See the quick tutorial on artifact
rejection for more information.
http://www.sccn.ucsd.edu/eeglab/quickrej.html
Best,
Arno
> Hi Alexandra,
>
> If I understand your problem correctly, the only thing you have to do
> is to overwrite with zeros that component which you would like to
> discard. After this you can make the inverse transformation.
>
> Miklos
>
> --
> Miklos Argyelan MD, MSc
>
> SUNY Downstate Medical Center
> 450 Clarkson Ave, New York, NY, 11203
> tel: +1-718-270-2975
>
> On 3/2/06, *Vuckovic, Aleksandra* <vuckovic at essex.ac.uk
> <mailto:vuckovic at essex.ac.uk>> wrote:
>
> Hello,
>
> I would like to remove eye movement artefacts from EEG signals. I saw
> that ICA is very efficient in it. However I would like to work on EEG
> data not on ICA components. I have 64 channels EEG. So when I perform
> ICA, EOG will be one component which I can discard. However if I now
> want to perform inverse transformation I have a problem: 63 ICA
> components and 64 EEG channels. Does anybody have a suggestion how to
> solve the problem? Would it help adding a dummy component of a
> constant
> value around 0, and then performing inverse ICA?
>
> Thanks a lot in advance!
>
> Aleksandra Vuckovic
>
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