Does fMRI-prep regress out mean global signal, mean tissue class signal by default? If so, how can I avoid it?
It does not. Column regressors for global signal and mean tissue are stored in the
confounds.tsv file associated with each scan, should you want to employ them later.
Thanks for your reply. What about AROMA, does it automatically apply AROMA if i did not use the tag --use-aroma?
No, it is not applied unless explicitly stated.