I wanna make sure that the impact of removing global mean signal from epi time series, but i can not find any option in the afni_proc.py. So I am wondering that if there is possible to remove global mean signal by the relevant options of afni_proc.py, or other afni command to make this happen. Thanks for your attention!
NB: in general, we recommend not doing global signal regression, with some discussions of this provided here:
If, however, you are interested in using for a comparison, say, then Rick has noted the way to do so in afni_proc.py here:
Okay, Thanks lot for your replying.