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Researchers ID brain abnormalities in children exposed to methamphetamine in utero
Date:3/16/2010

It has long been known that alcohol exposure is toxic to the developing fetus and can result in lifelong brain, cognitive and behavioral problems. Now, a new report out of UCLA shows that the effects of prenatal methamphetamine exposure or worse, a combination of methamphetamine and alcohol may be even more damaging.

Reporting in the March 17 issue of the Journal of Neuroscience, UCLA professor of neurology Elizabeth Sowell and her colleagues used structural magnetic resonance imaging (sMRI) to show for the first time that individuals whose mothers abused methamphetamine during pregnancy, with or without alcohol abuse, had structural abnormalities in the brain that were more severe than those seen in children whose mothers abused alcohol alone.

The researchers identified the brain structures that are vulnerable in such exposure, which may help predict particular learning and behavioral problems in methamphetamine-exposed children.

"We know that alcohol exposure is toxic to the developing fetus and can result in lifelong problems," said Sowell, the study's senior author. "In this study, we show that the effects of prenatal meth exposure, or the combination of meth and alcohol exposure, may actually be worse, and our findings stress the importance of seeking drug-abuse treatment for pregnant women."

In particular, said Sowell, a structure in the brain called the caudate nucleus, which is important for learning and memory, motor control, and punishment and reward, was one of the regions that was more reduced by methamphetamine than alcohol exposure.

Of the more than 16 million Americans over the age of 12 who have used methamphetamine, about 19,000 have been pregnant women, according to 2002󈝰 data from the National Survey on Drug Use and Health.

"About half of women who say they used meth during pregnancy also used alcohol," Sowell said, "so isolating the effects of meth on the dev
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Contact: Mark Wheeler
mwheeler@mednet.ucla.edu
310-794-2265
University of California - Los Angeles
Source:Eurekalert

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