 |
 |
Dear Vladimir,
Thank you very much for your detailed reply. I will try as you suggested!
Haoran.
At 2011-06-11 00:56:11，"Vladimir Litvak" <[log in to unmask]> wrote:
>Dear Haoran,> >There are two answers to that. The first answer is that whether there >is any signal in the MEG from amygdala or hippocampus is subject to >debate and there is some evidence in favor of that but it's not >conclusive. The second answer is that you can include sources in your >DCM model even if there is no signal in the MEG/EEG from these sources >and learn something about those 'hidden' source from their >interactions with sources that are observed. As an example you can >look at http://www.ncbi.nlm.nih.gov/pubmed/21325540 . You can either >just place sources e.g. in the hippocampus the usual way or (in an >up-to-date SPM) if you specify the position further that 200mm from >the origin (like [300 300 300]) the lead field of the source will be >set to zero and then it will be truly hidden source. You can compare >the two ways with model comparison to see if there is really any >evidence for the source being at particular location or not. >>Best,>>Vladimir>
>2011/6/9 飞鸟 <[log in to unmask]>: >> Dear spm's users, >> Thanks for your concern! As DCM for EEG/MEG is based on nerual mass model, >> I wonder that can I apply DCM for EEG/MEG to cerebral limbic system( such as >> cingulate, hippocampus and amygdala etc). In other words, is it valid to >> specify my model not only include cortex regions(e.g. frontal lobe, temporal >> lobe etc.), but also include cingulate or other limbic system's regions? >> Any help will be appreciated!>> >> -->> Haoran LI (MS) >> Brain Imaging Lab, >> Research Center for Learning Science, >> Southeast University >> 2 Si Pai Lou , Nanjing, 210096, P.R.China >>>>