I am studying on DCM for ERP , for this , I use EEG dataset and I extract ERP information from it which for each subject, leads to a 83*129*275 matrix ,where 83 indicates number of trials , 129 indicates the number of channels and 275 is number of samples in each trial. The database is visual memory rather than auditory.

 In our EEG dataset we also have the electrode locations in Cartesian x, y, z coordinates, and the polar coordinate system as well .

I wonder if SPM toolbox in 3Dsource part, could give any information regarding to identification of the active regions on the brain Such as coordinates of the DCM requires in the electromagnetic model part. If yes, what is the algorithm which enable SPM to get to the source information by using channel information?

How can I load my own dataset in SPM? , so far I couldn’t do it at all in any part of SPM, I mean neither in 3Dsource part and nor in DCM (load data) part.

best regard

vafa89