[FieldTrip] spatial and temporal ICA after beamformer

["Jörn M. Horschig"]

Hi Tyler,

sorry, I realized too late that you want to use LCMV on ICA components - 
mostly because your approach resulted in many different erros ;). Afaik, 
it is not possible to use beamforming on ICA components. On Wednesday we 
talked about this in our weekly FieldTrip meeting and identified some 
occasions where FieldTrip is not handling IC-data well. This can lead to 
unexpected results and missing warnings or errors. However, you can use 
dipole modelling (like EEGlab does) or MNE if you want to. These should 
work with ICs.

Any reason why you want to use LCMV on ICs? In theory, both steps 
constitute a spatial filter, so you can try to be smart and first to 
LCMV on all your channel level data, and then apply the LCMV spatial 
filter on the individual backprojected ICs. Somewhat a complicated 
procedure, but I think it would work?

Best,
Jörn



On 4/4/2014 7:23 AM, Tyler Grummett wrote:
>
> Hello fieldtrip,
>
>
> I was wondering whether it was possible in the fieldtrip toolbox to 
> run a spatial and temporal ICA on data after it has been run through 
> ft_sourceanalysis (We can a LCMV beamformer on EEG data that had been 
> timelocked).
>
>
> Currently it is saying that I need raw data for it to be processed.
>
>
> Tyler
>
>
> *************************
>
> /Tyler Grummett ( BBSc, BSc(Hons I))/
> /PhD Candidate/
> /Brain Signals Laboratory/
> /Flinders University/
> /Rm 5A301/
> /Ext 66124/
>
>
> _______________________________________________
> fieldtrip mailing list
> fieldtrip at donders.ru.nl
> http://mailman.science.ru.nl/mailman/listinfo/fieldtrip


-- 
Jörn M. Horschig
PhD Student
Donders Institute for Brain, Cognition and Behaviour
Centre for Cognitive Neuroimaging
Radboud University Nijmegen
Neuronal Oscillations Group
FieldTrip Development Team

P.O. Box 9101
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The Netherlands

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