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Childhood lead exposure causes permanent brain damage
Date:12/1/2009

CHICAGO A study using functional magnetic resonance imaging (fMRI) to evaluate brain function revealed that adults who were exposed to lead as children incur permanent brain injury. The results were presented today at the annual meeting of the Radiological Society of North America (RSNA).

"What we have found is that no region of the brain is spared from lead exposure," said the study's lead author, Kim Cecil, Ph.D., imaging scientist at Cincinnati Children's Hospital Medical Center and professor of radiology, pediatrics and neuroscience at the University of Cincinnati College of Medicine. "Distinct areas of the brain are affected differently."

The study is part of a large research project called the Cincinnati Lead Study, a long-term lead exposure study conducted through the Cincinnati Children's Environmental Health Center, a collaborative research group funded by the National Institute of Environmental Health Sciences and U.S. Environmental Protection Agency. The Cincinnati Lead Study followed prenatal and early childhood lead exposure of 376 infants from high-risk areas of Cincinnati between 1979 and 1987. Over the course of the project, the children underwent behavioral testing and 23 blood analyses that yielded a mean blood lead level.

Lead, a common and potent poison found in water, soil and lead-based paint, is especially toxic to children's rapidly developing nervous systems. Homes built before 1950 are most likely to contain lead-based paint, which can chip and be ingested by children.

"Lead exposure has been associated with diminished IQ, poor academic performance, inability to focus and increased risk of criminal behavior," Dr. Cecil said.

Dr. Cecil's study involved 33 adults who were enrolled as infants in the Cincinnati Lead Study. The mean age of the study participants, which included 14 women and 19 men, was 21 years. The participants' mean blood lead levels ranged from 5 to 37 micrograms per decilit
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Contact: Linda Brooks
lbrooks@rsna.org
630-590-7762
Radiological Society of North America
Source:Eurekalert

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