ADHD Not Caused By Dopamine Suggests Researchers

Medindia Health News
Medindia largest health website in india. // via fulltextrssfeed.com 
50% off Print Subscription of USA Today

Get the news delivered to your doorstep. Lock in the savings and receive USA Today for just $0.75 a day.

From our sponsors

ADHD Not Caused By Dopamine Suggests Researchers

Nov 15th 2013, 19:03
Contrary to the previously accepted view, dopamine dysfunction is not the main cause of attention deficit hyperactivity disorder, claims researchers at Cambridge University in Britain.

 ADHD Not Caused By Dopamine Suggests Researchers

A new study at the British university questions whether attention deficit hyperactivity disorder (ADHD) is the result of fundamental abnormalities in dopamine transmission, and claims that the main cause of the disorder may lie, instead, in structural differences in the grey matter in the brain.

The study, published in Brain magazine, could significantly improve our understanding of ADHD.

The study found that administering methylphenidate (more commonly known as Ritalin) to healthy adult volunteers as well as those who exhibit symptoms of ADHD as adults, led to similar increases of the chemical dopamine in their brain.

Both groups also had equivalent level of improvements as a result of the drug when tested on their ability to concentrate and pay attention.

In both groups, volunteers were given either a dose of Ritalin or a placebo pill.

Researchers then analysed the results of tasks done by the volunteers which tested their ability to concentrate and pay attention over a period of time.

Patients suffering from ADHD, who had significant loss of grey matter in the brain, as measured by magnetic resonance imaging, were found to be less attentive as compared to healthy individuals.

“We feel these results are extremely important since they show that people who have poor concentration improve with methylphenidate (Ritalin) treatment whether they have a diagnosis of adult ADHD or not,” lead author of the study professor Barbara Sahakian said.

“These new findings demonstrate that poor performers, including healthy volunteers, were helped by the treatment and this improvement was related to increases in dopamine in the brain,” she said.

“These findings question the previously accepted view that major abnormalities in dopamine function are the main cause of ADHD in adult patients. While the results show that Ritalin has a ‘therapeutic’ effect to improve performance, it does not appear to be related to fundamental underlying impairments in the dopamine system in ADHD,” co-author of the study, professor Trevor Robbins said.

Source: IANS

You are receiving this email because you subscribed to this feed at blogtrottr.com.

If you no longer wish to receive these emails, you can unsubscribe from this feed, or manage all your subscriptions

Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: