To determine the nature and extent of neurobehavioural problems following apparent low-
level exposure to organophosphate pesticides (OPs), a cross-sectional study was
undertaken in which performance on neuropsychological tests of a self-selected sample of
25 exposed agricultural workers was compared with 22 non-exposed healthy volunteers
matched for age, gender, years spent in education, and levels of intelligence. Exposed
subjects performed significantly worse than controls on tests of mental flexibility and verbal …