HOME >> MEDICINE >> NEWS
Brain shrinkage in ADHD not caused by medications

A 10-year study by National Institute of Mental Health (NIMH) scientists has found that brains of children and adolescents with Attention Deficit Hyperactivity Disorder (ADHD) are 3-4 percent smaller than those of children who don't have the disorder and that medication treatment is not the cause. Indeed, in this first major study to scan previously never-medicated patients, they found "strikingly smaller" white matter volumes in children who had not taken stimulant drugs. Still, the course of brain development in the ADHD patients paralleled that of normal subjects, suggesting that whatever caused the disorder happened earlier.

Drs. Xavier Castellanos, Judith Rapoport, NIMH Child Psychiatry Branch, and colleagues, report on their magnetic resonance imaging (MRI) study of 152 boys and girls with ADHD in the October 9, 2002 Journal of the American Medical Association.

Affecting 3-5 percent of school-age children, ADHD is characterized by over-activity, distractibility and impulsiveness. The disorder affects two to three times as many boys as girls, with as many as 20 percent of boys taking stimulant medication in some school systems. The new study strengthens the validity of the diagnosis by helping to put to rest criticism that structural brain abnormalities seen in ADHD might be drug-induced.

"There is no evidence that medication harms the brain," said Castellanos, who conducted the study at NIMH before joining New York University. "It's possible that medication may promote brain maturation."

Launched in l991, the study used MRI to scan 89 male and 63 female patients ages 5-18, with ADHD, and 139 age- and gender-matched controls, children and adolescents without ADHD. Most patients were scanned at least twice, and some up to four times over the decade.

As a group, ADHD patients showed 3-4 percent smaller brain volumes, in all regions. The more severe a patient's ADHD symptoms as rated by parents and clinicians th
'"/>

Contact: Jules Asher
NIMHpress@mail.nih.gov
301-443-4536
NIH/National Institute of Mental Health
8-Oct-2002


Page: 1 2 3

Related medicine news :

1. Brain activity prior to treatment flags vulnerability to antidepressant side effects
2. Brain imaging study may hold clues to onset of schizophrenia in people at high risk
3. Brain imaging reveals secrets of love, fear and betrayal
4. Brain imaging studies investigate pain reduction by hypnosis
5. Brain tumor with dismal prognosis in infants can be cured in older children
6. Brain-scanning technologies need standards, according to Stanford researcher
7. Brain activity of men and women during hostile or impulsive acts differs less on nicotine
8. Brain synapse formation linked to proteins, Stanford study finds
9. Brain tumor treatment can vary greatly, according to new JAMA study
10. Brain region identified that controls collecting behavior
11. Brain imaging reveals new language circuits

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:8/19/2017)... ... August 19, 2017 , ... Praeclarus Press has launched ... illustrations show the diversity of the breastfeeding mothers, using bright colors and ... sizes. These illustrations are also available on tote bags, notepads, smartphone cases, clocks, ...
(Date:8/19/2017)... ... August 19, 2017 , ... Parker ... community of over 1,000 passionate employees, caregivers, volunteers, thought leaders, researchers, educators and ... changed ownership, it was time to refresh the carpeting with the goal of ...
(Date:8/19/2017)... ... 2017 , ... “Congratulations! It's A Boy! God’s Gift: A Story of Love”: ... God. “Congratulations! It's A Boy! God’s Gift: A Story of Love” is the creation ... York. , Published by Christian Faith Publishing, Dale Anthony and Rachael Anthony’s new book ...
(Date:8/18/2017)... (PRWEB) , ... August 18, 2017 , ... More than ... Democratic Republic of Congo (DRC) thanks to an ambitious venture that conjoined the passions ... as the generous support of the Liberty community. These shoes will save lives from ...
(Date:8/18/2017)... , ... August 18, 2017 ... ... Quick International, LLC (“Quick”), a highly specialized asset-light logistics provider of complex ... into a definitive agreement to purchase Unitrans International Corporation, a division of ...
Breaking Medicine News(10 mins):
(Date:8/15/2017)... , Aug. 15, 2017  AOTI Inc. announced today that ... Therapy Inc., has recently opened a New York City Office in ... usage of its unique Topical Wound Oxygen (TWO 2 ) homecare ... the Accreditation Commission for Health Care (ACHC) under the company,s DMEPOS ... ...
(Date:8/8/2017)...   Second-quarter 2017 ... loss per share from continuing operations ... 16 percent to $110 million ... to $161 million Second-quarter ... operations increased 8 percent to $0.93 ...
(Date:8/7/2017)... 2017  Endo International plc (NASDAQ: ENDP ... virtually all known U.S. mesh product liability claims and ... known remaining U.S. claims at reasonable values. Under the ... fourth quarter of 2017 and continuing through the fourth ... 2017 results, the Company intends to increase its mesh ...
Breaking Medicine Technology:
Cached News: