It has come to the knowledge from a research work of the National Institute of Mental Health, better known as the NIMH, a distinguished constitute of the National Institutes of Health's (NIH) that the specific areas of the brain involved solely with the purpose of controlling attention were found to be in the thinnest proportion in children specially affected with the Attention Deficit Hyperactivity Disorder or ADHD which also carried a particular version of a gene. On the other hand, the specified area on the right side of the brain's outer mantle or cortex was found to get normalized in thickness, during the teen years o these children, that also coincided with the clinical improvement. It has also come to the fore as a part of the study that undoubtedly this very gene version augmented the greater risk for ADHD, there was also the fruitful prediction of better clinical outcomes and also of higher IQ than the other general versions of the same gene in youth affected with ADHD.    

While speaking on the occasion Dr.  Philip Shaw, M.D., NIMH Child Psychiatry Branch and also the most prominent person in leading the research said, "Since this gene version had similar structural effects in healthy children as in children with the disorder, our findings suggest that ADHD is at the far end of a continuum of normal traits. ADHD likely stems from interactions between several such genes and non-genetic factors." On the contrary Dr. Thomas R. Insel, M.D. and Director of the NIMH said, "This study provides us with a first glimpse of how variation in a specific gene influences both brain development and clinical prognosis in ADHD."

It is to be remembered that on the very last year when the NIMH researchers were found reporting over the alliance of the normalization of the right cortex thickening with the better clinical outcomes in ADHD, within it there were also few hints of a genetic connection.   But it is the availability of prominent evidences from several studies of the past that became the greatest force behind the development of susceptibility of an genetic connection. Yet evidence from several previous studies led them to suspect involvement of an ADHD-implicated version of a gene that codes for a receptor protein that binds to the brain chemical messenger dopamine.