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Use of materials published in EHP should be acknowledged for example,? Reproduced with permission from Environmental Health Perspectives? Articles from EHP, especially the News section, may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright. By contrast, lead Pb exposure in childhood has been associated with ADHD and disruptive behaviors in several studies.
Objectives: In this study we examined the relation of developmental exposure to MeHg, PCBs, and Pb to behavioral problems at school age in Inuit children exposed through their traditional diet. Methods: In a prospective longitudinal study conducted in the Canadian Arctic, exposure to contaminants was measured at birth and at school age. Conclusions: To our knowledge, this study is the first to identify an association between prenatal MeHg and ADHD symptomatology in childhood and the first to replicate previously reported associations between low-level childhood Pb exposure and ADHD in a population exposed to Pb primarily from dietary sources.
Keywords: ADHD, attention, children, exposure, externalizing behavior, lead, mercury, methylmercury, polychlorinated biphenyls. Mercury Hg , polychlorinated biphenyls PCBs , and lead Pb are widespread environmental contaminants known for their adverse effects on neurodevelopment Grandjean and Landrigan Organic Hg, or methylmercury MeHg , is the most neurotoxic form of Hg and is present in fish and marine mammals Word Health Organization The adverse effects of acute MeHg exposure in utero have been documented following poisoning episodes that occurred in Japan ; β65 and Iraq β72 and include neurological symptoms and developmental delays Amin-Zaki et al.
