Abstract
Animals treated with MPTP neurotoxin displayed lowered motor and exploratory activity in the open field test, reduced daily intake of water with a preference for sugar solution over water, prolonged immobilization, and increased index of depression in the forced swimming test. The changes in rat behavior were preserved for at least a week after withdrawal of the drug. The data attest to the development of a state of lowered motivational activity combined with ahedony and “behavioral despair” in response to MPTP, making it possible to consider this state as a new experimental model of dopamine-dependent depressive syndrome in rats.
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