Brain regions showing significantly reduced activation for the OXTR SNP rs2268493 risk allele group during the anticipation phase of the monetary incentive delay task using both a general linear model approach and permutation testing. (a) General linear model analyses (in red). Z values indicate cluster thresholds. (b) Randomize permutation testing analysis (in blue). Note the convergence of effects in the left NAcc and ACG. ACG, anterior cingulate gyrus; L, left; NAcc, nucleus accumbens; OXTR, oxytocin receptor; PCG, paracingulate gyrus; SNP, single nucleotide polymorphism.