Table 1: The N-back and the RP task resulted in the same pattern of PCu fragmentation. The dorsal PCu (dPCu) and ventral PCu (vPCu) were identified as the regions responsive to different cognitive load: the dPCu was activated while the vPCu was deactivated by an increased cognitive demand in difficult versus easy conditions. The N-back task provided a statistically stronger demonstration (larger significant clusters) of this, possibly because the task had more trials i.e. bigger sample size (80 trials in the N-back, vs. 27 in the RP task).
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