From analyses exploring the VTA, ventral striatum, and caudate ROIs, the only significant results were a marginal main effect of Odor in the VTA (F= 4.043,35, p< 0.06) and a significant Genotype × Odor interaction (F= 4.381,34, p< 0.05). In this case, however, the Genotype × Odor interaction reflected a greater AO response (compared to ApCO) among AG genotypes than in AA genotypes (Figure 4).
