I was wondering how I might go about implementing hidden nodes with DCM with cross-spectral fMRI densities, specifically with spm_dcm_fmri_csd.

With spm_dcm_estimate, my understanding is that one is able to specify DCM.options.hidden (as described in an earlier thread: https://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind1410&L=SPM&F=&S=&P=539692).

Thank you for any assistance you may be able to provide.