CADM1 and attention deficit-hyperactivity disorder: Interestingly, CADM1 is highly expressed in many brain areas, including the cingulate cortex, parietal lobe, temporal lobe, occipital lobe, amygdala, caudate nucleus, cerebellum, and, especially, prefrontal cortex (http://biogps.org/#goto=genereport&amp;id=23705), all of which represent the most relevant common brain regions identified by neuroimaging studies of ADHD (Liston et al., 2011).