[Freesurfer] wm and vcsf nuisance regressors

Dear Freesurfers

Hi

I am using white matter and CSF external nuisance regressors in my mkanalysis-sess.

However, when I make these regressors, I use -mean in fcseed-config command, and so the .dat files only have one column (the mean values, I assume).

I looked up in the freesurfer archive and I saw that It is recommended to use -nuisreg wm.dat 5 and -nuisreg vcsf.dat 5.

My question is that what difference it makes to use mean of these regressors vs using only 5 of the columns.

I appreciate if you could please reply whenever you had time.

Thanks

Mona

Zahra (Mona) Nasiriavanaki

Postdoctoral Research Fellow

Martinos Center for Biomedical Imaging

Massachusetts General Hospital

149 13th Street, 149-2615

Charlestown, MA, USA, 02129