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
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