New research indicates a connection in the brain might be responsible for causing attention deficit-hyperactivity disorder, or ADHD.
ADHD is one of the most prevalent mental disorders in children and teens and can last beyond adolescence. Its symptoms vary widely and can impair a person's ability to pay attention, complete a task or be productive.
"It is estimated that at least 3 to 5 percent of the adult population in the U.S. suffers from ADHD," said Dr. Nora Volkow, with the National Institute on Drug Abuse.
Past research has shown that symptoms like impulsive behavior and inattention could be caused by the disrupted transmission of dopamine, a chemical that helps cells communicate.
"Dopamine is considered a neurotransmitter that is crucial for our ability to perceive rewards and to be motivated in our behavior," Volkow said.
Published in the Journal of the American Medical Association, the study compared the dopamine reward pathway in the brains of 53 adults with ADHD and 44 adults who don't have it.
"There was a lower concentration of dopamine markers in the brains of individuals with ADHD, specifically in the areas of the brain that are involved with reward and motivation," Volkow said.
Researchers said the findings help explain why ADHD have a hard time focusing on tasks they don't find interesting. The study supports the concept that making school and work tasks seem more rewarding to patients with ADHD could improve performance.





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September 14, 2009 11:48 a.m.
September 11, 2009 2:03 p.m.
Believe me, that would be preferable to the endless meetings with his school, the drugs amounting to well over $2000 each year, the therapies costing upward of $5000 each year, the constant explanations to daycares and family, and the day-to-day stress on us and him.
I thank those with no medical training and plethora of basis opinions for clearing up this problem for all of us. I'm glad you took the time to tell us how to fix this.
BTW, what do you suggest we do with people who have heart disease? Would spanking them and taking away their toys fix them too?
September 11, 2009 12:58 p.m.
When we stop trying to keep up a certain indulgent lifestyle, and start focusing on our children (that we chose to have) -- then all this labeling will fall by the wayside.
Some people are just plain lazy in parenting, and life in general. howdiditgettothis"
As a parent of a child with ADHD and Asperger's Syndrome, I can assure you that I am NOT neglectful, neither is my child "spoiled." BOTH disorders run in my family (particularly among the men), and if you would take the time to educate yourself, you would see that there are actual BRAIN DIFFERENCES between neuro-typical children and those with ADHD.
I truly hope you don't work with children. It is folks with that type of attitude that make life so hard on those us coping with brain disorders.
September 11, 2009 12:55 p.m.
September 11, 2009 11:31 a.m.