AnswersTV.com, video is hosted by Dr. Gerald Chodak. Video gives the history of ADHD, what happens in the brain, and what is often used to treat ADHD. ADHD is a common behavioral disorder and occurs before the age of seven. What they do know is that the occurrence of ADHD is tied to biological factors such as the size and density of various brain structures and the chemical reactions that take place in the brains. ADHD children often have a smaller cortex, which controls thought and action, this diminished size occurs in the frontal lobe, which plays a role in impulse control, reason and judgment. Nerve tissue in ADHD children is thinner or smaller than a child who does not ADHD. There may also be chemical differences as well. Video gives good information on ADHD. Video is good for parents and teachers who want to learn more about ADHD.