Zhi Wang wrote:
>
> Dear SPMers:
> I downloaded the example data of DCM from spm website. When I go to
> the step showed in the attached file, I don't know what I should do next.
> The readme_GLM_DCM.TXT says as below:
> 10. Just connect Photic to V2
> 11. Connect Motion to modulate the bottom-up connection from V1 to V5
> 12. Connect Attention to modulate the top-down connections from PFC to
> PPC and from PFC to PPC.
>
>
> Where is the V2?
Yes - sorry about that. In the original paper by Buchel et al. they refer to the
V1/V2 complex as they're not sure if their region is V1 or V2.
So here 'V1' and 'V2' refer to the same region.
> how to Connect Motion to modulate the bottom-up connection from V1 to V5
> and Connect Attention to modulate the top-down connections from PFC to
> PPC and from PFC to PPC?
This can be done using the Graphical User Interface for DCM. There is
a modulatory matrix - and you fill 'dots' in where you want there
to be a modulatory connection.
Best,
Will.
>
> Thanks!
>
>
>
> ------------------------------------------------------------------------
> Zhi Wang
> 2006-04-26
>
> ------------------------------------------------------------------------
>
--
William D. Penny
Wellcome Department of Imaging Neuroscience
University College London
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London WC1N 3BG
Tel: 020 7833 7475
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URL: http://www.fil.ion.ucl.ac.uk/~wpenny/
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