Dear Mina,
I'm not DCM expert but before you get anwers from experts I think this
paper could be helpful to answer your questions.
Heim S, Eickhoff SB, Ischebeck AK, Friederici AD, Stephan KE, Amunts K
(2007) Effective connectivity of the left BA 44, BA 45, and inferior
temporal gyrus during lexical and phonological decisions identified with
DCM. Hum Brain Mapp.
http://www.ncbi.nlm.nih.gov/pubmed/18095285?dopt=Citation
Best,
Qing
Mina Khoshnejad a écrit :
> Hello,
>
> For group analysis in DCM, do we have to select VOI, for each subject
> and each run seperately (according to the GLM results for each run)?
> It takes a long time to do that, and also there is always variations
> across subjects and not all subjects show the excat same pattern. so
> the VOI might vary a bit from subject to subject.
>
> What is the general approach to select VOI for a group DCM?
>
> Many thanks for your answer in advance.
> Mina
>
>
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