Although much research on attention deficit / hyperactivity disorder (ADHD) were based on neuropsychological factors, neuroanatomical, neurochemical and genetic basis, we are still far from fully understanding its etiology. Since it is impossible to explain ADHD, based purely genetic, has intensified the interest in the influence of environmental factors, including exposure to chemical contaminants. To date, most studies on this topic focuses on only two agents pollutants, lead and PCBs, although it is beginning to be considered the potential impact of other chemicals. Our hope is that the evidence of the similarities between the effects of these contaminants and neurobehavioral deficits observed in children with ADHD will strengthen our research on the influence of environmental chemical exposures on attention disorder / hyperactivity. You need a better understanding of their role on ' ADHD and other neurological disorders development, and this knowledge could be useful in the search for other environmental agents such as brominated flame retardants, bisphenol A, phthalates, organophosphate pesticides and chemicals perfluorinated that recent research has indicated as possible factors associated with disorders of attention / hyperactivity .
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