In this study, they examined anti-correlations
of different subnetworks within the DMN during rest using both seed - based and
point process analyses, and discovered that: (1) the ventral branch
of the DMN (vDMN) yielded significantly
weaker anti-correlations than that associated with the dorsal branch
of the DMN (dDMN); (2) vDMN anti-correlations introduced by GSR were distinct from dDMN anti-correlations; (3) PCC / precuneus seeds employed by earlier studies
mapped to different DMN subnetworks, which may explain some
of the inconsistency (in addition to preprocessing steps) in the reported DMN anti-correlations.