Artigo de Periódico
Manganese exposure and the neuropsychological effect on children and adolescents: a review
Fecha
2009Registro en:
1680-5348
26(6)
Autor
Menezes Filho, José Antônio
Bouchard, Maryse
Sarcinelli, Paula N.
Moreira, Josino C.
Menezes Filho, José Antônio
Bouchard, Maryse
Sarcinelli, Paula N.
Moreira, Josino C.
Institución
Resumen
Objectives. Manganese (Mn) is an essential element, but overexposure can have neurotoxic
effects. Methods. In this article, we review and summarize studies on exposure to Mn and nervous system impairments in children.
Results. We identified 12 original articles published between 1977 and 2007. Overexposure
to Mn was suspected to occur through diverse sources: infant milk formula, drinking water,
industrial pollution, and mining wastes. The most common bioindicator of exposure to Mn
was hair Mn content, but some studies measured Mn in blood, urine, or dentin; one study on prenatal exposure measured Mn content in cord blood. Most studies indicate that higher postnatal exposure to Mn is associated with poorer cognitive functions and hyperactive behavior. Conclusions. The limitations of the existing studies are numerous: most were crosssectional, had a modest sample size, and lacked adjustment for important confounders. Future investigations should be performed on a larger sample size and include a more detailed exposure assessment, addressing multiple sources of exposure such as food, water, and airborne particulates.