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Unilateral injections of dopamine into the substantia nigra pars reticulata of pargyline-pretreated rats caused a prolonged, contralateral circling, similar in magnitude to that elicited by the injection of the same amount of dopamine intrastriatally. Contralateral circling was also elicited by the unilateral intranigral injection of amphetamine (after pargyline pretreatment), or by the dopamine agonists ergometrine and SKF 38393. In contrast, bilateral intranigral injection of the dopamine antagonist haloperidol greatly reduced the amphetamine-induced circling of rats with unilateral 6-hydroxydopamine-induced nigrostriatal lesions. These results support the hypothesis that dopaminergic mechanisms in the substantia nigra are involved in motor behavior.
E A Jackson, and
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July 1976,
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E A Jackson, and
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March 1981,
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E A Jackson, and
P H Kelly
December 1980,
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E A Jackson, and
P H Kelly
July 1986,
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E A Jackson, and
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July 1981,
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E A Jackson, and
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E A Jackson, and
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E A Jackson, and
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E A Jackson, and
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E A Jackson, and
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