[Eeglablist] ICA artifact removal for simultaneous EEG/fMRI

[Jed Meltzer]

Hello all,

Here's a question for open discussion.  What do you
think about the possibility of using the ICA-based
artifact removal procedure outlined in the EEGLAB
tutorial, for removing the gradient and ballistocardio
artifacts from EEG aquired inside an fMRI scanner?  I
know these artifacts are huge compared to the EEG
signal, but they are quite predictable and stable
across time, and so it seems to me that they might
lend themselves quite nicely to removal by subtraction
of their independent components from the data.  Not
that I have tried yet though.  I am surprised that the
Salk group has posted that book chapter "Having your
voxels and timing them too" dealing with simultaneous
EEG/fMRI, but they did not elect to use this method. 
Is there a reason a priori to expect that it would not
work?  Has anyone out there tried it?  

-Jed Meltzer
Yale University

__________________________________________________
Do you Yahoo!?
Yahoo! Mail Plus - Powerful. Affordable. Sign up now.
http://mailplus.yahoo.com