Not all frontal regions showed sensitivity to conflict. In the middle time window, left IFG showed the largest response to neutral stimuli as compared to all others under both placebo (F(1,19) = 8.0, p<0.02), and alcohol (F(1,19) = 10.2, p<0.005), in agreement with its role in semantic processing [35]. A similar effect was found in the late time window under placebo (F(1,19) = 12.5, p<0.005), but not under alcohol (F(1,19) = 2.2, ns).
