[FieldTrip] source analysis EEG data without MRI

[Ingrid Nieuwenhuis]

Hi all,

I'd like to do source analysis (loreta and or DICS) on my EEG data. I 
don't have anatomical MRIs and I don't have a measurement of the scalp 
surface. So I'd like to use a template MRI or a template head model that 
is located in the FieldTrip template directory. I have EGI (128 
channels) data and electrode positions (not subject specific, just the 
standard file also available in FieldTrip electrode template, 
GSN-HydroCel-128.sfp), but I'm kind of stuck how to start. I don't see 
any examples on the FieldTrip page of how to make a headmodel and volume 
conduction model giving only this limited data. I'd be happy to make it 
into a example Matlab script on the FieldTrip page after I got it to 
work. Would someone be able to give me some pointers, or example code?

Thanks a lot!
Ingrid

-- 
Ingrid Nieuwenhuis PhD
Postdoctoral Fellow
Sleep and Neuroimaging Laboratory
Department of Psychology
University of California, Berkeley
California 94720-1650
Tolman Hall, room 5305