Steve, Please read the following Study: Our unclear understanding of ADHD — Neuroscientifically… http://www.neuroscientificallychallenged.com/blog/unclear-understan... Nov 10, 2014 … By 2011, about 1 in every 10 children ages 4 to 17 in the United … dopamine dysregulation may not be the primary cause of ADHD. … If a dopamine deficiency isn’t the underlying cause of ADHD, then what is? … del Campo, N., Fryer, T., Hong, Y., Smith, R., Brichard, L., Acosta-Cabronero, J., Chamberlain, … I believe they are asking the wrong questions Steve. The question should be, What is the cause of ‘dopamine dysregulation’. The answer to that question would be the primary cause of ADHD. As you know, I believe Kids diagnosed with ADHD are perfectly NORMAL both mentally and physically. In fact, they must have a very good sense of ‘right and wrong’ for ADHD behavior to work for them. Dr. George Still ruled out ‘Idiot and Imbecile’ behavior 115 years ago, because ‘they’ have no sense of right or wrong.