Dear Ignacio
Some further work on integrating structural and effective connectivity was done by Arseny Sokolov (references below). The most interesting work, from a methods perspective, was about asymmetric higher-order (indirect) structural connectivity. However, I suggest thinking carefully about whether this kind of integration is necessary for the hypotheses you wish to test - it will be a lot of work to get up to speed and there may be simpler approaches, e.g. including structural measures in a regression analysis with effective connectivity as the dependent variables.
Best
Peter
Sokolov, A.A., Zeidman, P., Erb, M., Ryvlin, P., Friston, K.J. and Pavlova, M.A., 2018. Structural and effective brain connectivity underlying biological motion detection. Proceedings of the National Academy of Sciences, 115(51), pp.E12034-E12042.
Sokolov, A.A., Zeidman, P., Erb, M., Ryvlin, P., Pavlova, M.A. and Friston, K.J., 2019. Linking structural and effective brain connectivity: structurally informed Parametric Empirical Bayes (si-PEB). Brain Structure and Function, 224, pp.205-217.
Sokolov, A.A., Zeidman, P., Erb, M., Pollick, F.E., Fallgatter, A.J., Ryvlin, P., Friston, K.J. and Pavlova, M.A., 2020. Brain circuits signaling the absence of emotion in body language. Proceedings of the National Academy of Sciences, 117(34), pp.20868-20873.
Sokolov, A.A., Zeidman, P., Razi, A., Erb, M., Ryvlin, P., Pavlova, M.A. and Friston, K.J., 2020. Asymmetric high-order anatomical brain connectivity sculpts effective connectivity. Network neuroscience, 4(3), pp.871-890.
-----Original Message-----
From: SPM (Statistical Parametric Mapping) <[log in to unmask]> On Behalf Of <Ignacio> <Obeso>
Sent: 04 August 2023 17:19
To: [log in to unmask]
Subject: [SPM] DTI informs DCM
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Hello!
would like to know if anyone has applied tractography data onto DCM. Based on the 2009 paper from Stephan et al., the inclusion of DTI as priors to inform the DCM connectivity may be a more realistic (in a physiological term) to create a winning model. Yet, I find no example scripts or guidance on the implementation on how to update the DCM.a or DCM.b-c matrices.
Any help is welcome.
best
Ignacio
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