Navigation Links
More Delays in Brain Growth Seen With ADHD

By Amanda Gardner
HealthDay Reporter

WEDNESDAY, Aug. 15 (HealthDay News) -- Researchers have uncovered more evidence that certain types of delays in brain development seem to be related to a heightened risk for attention-deficit hyperactivity disorder (ADHD).

A new study appearing in the current issue of the journal Biological Psychiatry found that development of the cortical surface -- which covers the region of the brain known as the cerebral cortex -- was slower in children with ADHD.

This complements previous research from the same team of scientists that found normal childhood thickening of the cerebral cortex also is delayed in the brains of children with ADHD.

At this point, the findings have no clinical implications but they may one day help point to genes that control the timing of brain development, said study author Philip Shaw, head of the Neurobehavioral Clinical Research Section at the National Human Genome Research Institute.

That, in turn, may lead to new insight into how to help kids with ADHD.

"This is more about understanding the causes and the underlying changes in the brain that happen with ADHD," added Jennifer Vannest, assistant professor of neurology at Cincinnati Children's Hospital. Vannest was not involved with the study.

Shaw and his colleagues did multiple brain-imaging scans of 234 children with ADHD and 231 normally developing children who served as controls. Scans began when the children were about 10 years old and continued until they were 17.

Kids with ADHD did not reach "peak" development in the cortical surface until 14.6 years of age, compared with 12.7 years in normally developing kids.

"In healthy kids, the surface of the gray matter -- the cortex -- increases during adolescence, reaches a peak, then stabilizes into adult dimensions," Shaw explained.

This report, added to the previous findings on cortical thickness, suggest that the same mechanisms may govern development of different areas of the brain. At this point, however, it is unclear what those mechanisms might be.

The finding also may help settle the ongoing question of whether ADHD is due in part to a delay in development processes or whether it is due to a complete derailing of typical development, Shaw said.

"We find that the overall pattern or sequence in which different parts of the brain [mature] was quite similar between kids with ADHD and those who didn't have ADHD, but just a bit delayed," Shaw said. "In kids with ADHD, the regions in which this delay was most prominent was in brain centers responsible for action and attention."

The study did have some limitations. The researchers were not able to study whether medications for ADHD might have had an effect on brain development, nor did they have enough participants to see if there were differences between boys and girls.

And, although the study showed an association, it did not prove a cause-and-effect linkage.

"This certainly is not the whole story of ADHD, but a delay in this structure of the cortex might be part of the story of ADHD," Shaw said.

More information

The National Institute of Mental Health has more on ADHD.

SOURCES: Philip Shaw, Ph.D., head, Neurobehavioral Clinical Research Section, National Human Genome Research Institute; Jennifer Vannest, Ph.D., assistant professor, neurology, Cincinnati Children's Hospital; Biological Psychiatry

Copyright©2012 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Supreme Court Surprises in Citizens United Montana Case, Delays Order
2. Infant Vaccination Delays Triple in Oregon: Study
3. New Brain-Cleaning System Discovered in Mice
4. Study: Vaccine targets malignant brain cancer antigens, significantly lengthens survival
5. Long-term methadone treatment can affect nerve cells in brain
6. Tripping the switches on brain growth to treat depression
7. Could Chocolates Antioxidants Boost Brain Function?
8. Condition Commonly Seen in Aging May Alter Brain Function
9. Harmless condition shown to alter brain function in elderly
10. Yale team discovers how stress and depression can shrink the brain
11. Dyslexia May Be Caused by Signal Processing Problem in Brain
Post Your Comments:
Related Image:
More Delays in Brain Growth Seen With ADHD
(Date:10/13/2017)... ... , ... PurhealthRX , a leading Health and Nutrition Company, is announcing ... full spectrum CBD oil will revolutionize the rapidly growing CBD market by reducing the ... incorporated into liquid products, while reducing costs to end users. , The team of ...
(Date:10/13/2017)... , ... October 13, 2017 , ... Apple Rehab ... services, staged a mock evacuation of the facility as part of a disaster drill ... Department, Echo Hose EMS and Shelton City Emergency Manager, as well as the ...
(Date:10/13/2017)... New York, NY (PRWEB) , ... October 13, 2017 , ... ... most influential people in business to advocate for action towards gender equality at their ... 18,000 views from around the globe, and reached a social audience of over 3 ...
(Date:10/13/2017)... ... 2017 , ... Talented host, actor Rob Lowe, is introducing ... new episode of "Success Files," which is an award-winning educational program broadcasted on ... subject in-depth with passion and integrity. , Sciatica occurs when the sciatic nerve ...
(Date:10/13/2017)... ... October 13, 2017 , ... “America On The Brink”: the Christian ... On The Brink” is the creation of published author, William Nowers. Captain Nowers ... a WWII veteran, he spent thirty years in the Navy. Following his career ...
Breaking Medicine News(10 mins):
(Date:10/11/2017)... Texas , Oct. 11, 2017  True ... services, has amplified its effort during National Breast ... about hereditary cancer risks. ... of Clinical Oncology calculated that more than 10 ... have inherited mutations in BRCA1 or BRCA2 and have ...
(Date:10/7/2017)... , Oct. 6, 2017   Provista, a ... than $100 billion in purchasing power, today announced a ... information. The Newsroom is the online home ... trends, infographics, expert bios, news releases, slideshows and events. ... to a wealth of resources at their fingertips, viewers ...
(Date:10/4/2017)... Oct. 4, 2017 OBP Medical ... illuminating medical devices, today announced regulatory approval from ... Agency (or Agência Nacional de Vigilância Sanitária (ANVISA)) ... cordless surgical retractor with integrated LED light source ... illumination and exposure of a tissue pocket or ...
Breaking Medicine Technology: