My question is about when it is appropriate to map data to the surface for resting-state analysis. I am following example 11 from the afni_proc.py help, but I would like to know what the advantages or disadvantages are to mapping the data to the surface before the regress steps or after the regress steps. The dataset I am working with is from a patient population and I am interested in individual differences in connectivity and how it relates to cognitive performance. For example, if I map to the surface before the regress steps, my afni_proc.py command would look like that pasted below. Is there any drawback to this approach vs. waiting until after the regress steps to map to the surface?
See example 8 (maybe merge it with example 11). Go to the
surface after volume registration and align to anat are done
(probably without standard space).
The main point is that it is preferable to blur on the surface,
not in the volume.
I followed your advice and merged Examples 8 (surface) and 11 (resting-state) to do resting-state preprocessing on the surface, but when I run my afni_proc.py command I am getting an error. The error is here:
** -regress_anaticor: not ready for surface analysis
** script creation failure for block ‘regress’
Something seems to not be merged properly in my command between the two examples. Any idea what is going on here? My afni_proc.py command is below.
The
National Institute of Mental Health (NIMH) is part of the National Institutes of
Health (NIH), a component of the U.S. Department of Health and Human
Services.