Prolonged behavioral effects of early postnatal lead exposure in rhesus monkeys: fixed-interval responding and interactions with scopolamine and pentobarbital.

Three groups of rhesus monkeys (N = 4/group) were administered daily doses of lead acetate dissolved in milk throughout the first year of life. The doses of lead administered were 0.9 mg/kg/day (high lead group), 0.3 mg/kg/day (low lead group), and no added dietary lead (control group). These doses resulted in mean blood lead concentrations over the first… CONTINUE READING