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A: average coefficient of variation (CV) of the interspike interval (ISI) during the fixation, stimulus presentation, and delay periods for neurons with significant delay period activity in the diametric distractor task (dlPFC, n = 107; PPC, n = 95). B: average CV in the random distractor task (dlPFC, n = 75; PPC, n = 85). C: average CV in the ODR task (dlPFC, n = 44; PPC, n = 66). Error bars represent SE.
