Abstract

Mipafox administered to rats daily for 35 days produced ataxia and a reduction in the level of dopamine in the corpus striatum. Treatment with Lepthophos for the same period slight motor dysfunction and a small but significant reduction in the level of striatal dopamine. Fenitrothion neither produced motor dysfunction nor changed the level of striatal dopamine. The cholinesterase activity of corpus striatum was inhibited by all the compounds. The results suggest the possible involvement of striatal dopamine in the delayed neurotoxic effects of certain organophosphorus compounds.

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