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Sustained BOLD response in AI and ACC with multiple target presentations. A, Modeled hemodynamic responses to targets separated either by a 4 or 8 s interval. B, Time courses of activation of the AI for target presentations at 4 and 8 s intervals. C, Time courses of activation of the ACC for target presentations at 4 and 8 s intervals. The AI and ACC showed transient, double-peaked patterns of activities during the long oddball presentation.
