Problem on bandpass filtering fMRI data

Hi, I’m trying to create functional brain networks from ADNI’s database. I’m getting help from this tutorial:

in papers that I’ve read, they do bandpass filtering between 0.01–0.08 Hz in some cases and 0.01-0.1 Hz in the others.

The tutorial hasn’t done any bandpass filtering but in confound regression section, it mentions that confounds can include low-frequency signals (usually below about .08 Hz)

should I do bandpass filtering or confound regression is enough? if yes where should I do filtering? before confound regression or after that?


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