i tried to read a Gordon2014FreeSurferSubcortical_desc-filtered_timeseries.ptseries.nii file (see 4. Derivatives - Collection 3165 - ABCD-BIDS Community Collection (ABCC)) using the “cifti” package in R, and it turns out to be a 352 x 1532 matrix. I presume the former number is the number of parcels and the latter is the number of timepoints. According to the atlas files here Cerebral Cortex Parcels | Petersen Neuroimaging Lab | Washington University in St. Louis the Gordon atlas only contains 333 parcels, so there seem to be an ‘extra’ 19 parcels in the Gordon2014FreeSurferSubcortical_desc-filtered_timeseries.ptseries.nii
is there some documentation on the Gordon atlas parcels used in the ABCC somewhere that i’ve missed?