Removing ECG artifacts via ICA in a Steady State experiment without EMG Channel (MEG)

[Panagiotis Tsiatsis]

Dear all,

I am a newbie in fieldtrip. First of all I would like to say thanks for
your beautiful work and support.

I am facing the following problem : I am running a Visual Steady State
MEG experiment (CTF scanner) and I want to remove the ECG artifacts but
I do not have an EMG channel available. I haven't managed to go fully
through the analysis (by the way, I was getting errors when trying to
run your ICA ECG example, but let me take another look) but I am worried
that by using the 'left' MEG channels (MLT) alone to detect the
artifacts I will not manage to go far, as the ECG activity will be
obscured by the steady state activity (10 Hz flickering light) and I
will not be able to from a proper averaged / typical ECG. Does anybody
have any experience with this? I know that it is quite silly to ask you
before trying completely and therefore I apologize beforehand. Once I
have fully gone through the analysis I can inform you on whether I
managed to do it reliably.

Thanks and best,
Panagiotis

----------------------------------
The aim of this list is to facilitate the discussion between users of the FieldTrip  toolbox, to share experiences and to discuss new ideas for MEG and EEG analysis. See also http://listserv.surfnet.nl/archives/fieldtrip.html and http://www.ru.nl/neuroimaging/fieldtrip.