Our study was premised on the view that ADHD is complex, with multiple behavioral domains being part of its characterization (impulsivity, inattention, hyperactivity, emotional regulation, and executive dysfunctions). Presumably, alterations in these domains can happen alone or in complex combinations, and in various magnitudes. Thus, it is likely that different brain circuits are involved in their neurobiology, and alterations in these circuits may, to some extent, relate to specific behavioral impairments. Therefore, it has become essential to understand how the different involved brain regions or circuits are associated with specific behavioral domains.