In a report of a study that was printed in the Biological Psychiatry,researchers apparently have found that there are certain diffferences between the brain reward system for patients with ADHD and children with no signs of the ADHD disorder.
In a small study, Spanish researchers used MRI to scan the brains of 84 children, half with ADHD and half with no signs of ADHD. They concluded that the ventral striatum, a small place in the brain that is responsible for reward, decisions, and risk was smaller, particularly on the right side, in those children with ADHD. This part of the brain maintains levels of motivation when a person starts a task and continues to maintain motivation until the task is completed.
These findings support results from previous studies in animals in which researchers identified an association between this part of the brain with impulsive behavior and hyperactivity.
The researchers conclude that ADHD is not only caused by brain alterations that affect cognitive processes, but is also calsued by brain irregularities that cause problems with motivation.
A study by Rubicon grant winner Ali Mazaheri has shown that a lack of communication between brain regions may result in ADHD symptoms. His conclusions add further support to the idea that ADHD is not due to a defect in the brain regions. […]
image of the human brain THURSDAY, Feb. 11 (HealthDay News) — A link appears to exist between attention-deficit hyperactivity disorder (ADHD) and anomalies in the brain’s reward system, a new study suggests. […]
New research suggests a new brain circuit may influence the development of attention-deficit/hyperactivity disorder (ADHD). Historically, ADHD was believed to.