Dear Fabienne,
In this case, you should simply specify a forward and a backward connection between left and right M1 in the A-matrices and specify the same connections in the B-matrix.
Best wishes
Martin
On 18 May2015, at 15:09, Fabienne Jung <[log in to unmask]> wrote:
> Dear all,
>
> I have a question regarding the specification of the connections in DCM for ERPs:
>
> is it possible to have a lateral connection between for example left M1 and right M1 that changes into a forward/ backward connection with stimulus presentation in the B-matrix? That means the B-effect is forward from right to left and backward from left to right?
>
> Thank you in advance!
>
> Best
> Fabienne
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