Effect of the nigrostriatal dopamine system on acquired neural responses in the striatum of behaving monkeys.
Dysfunction of the nigrostriatal dopamine system results in marked disorders of movement such as occur in Parkinson's disease. Functions of this dopamine-containing projection system were examined in monkeys trained in a classical conditioning task, and the effects of striatal dopamine depletion were tested. Unilateral dopamine loss substantially reduced the acquired sensory responsiveness of striatal neurons monitored electrophysiologically. This effect was ipsilateral and selective, and could be reversed by apomorphine. These results suggest that the primate nigrostriatal system modulates expression of neuronal response plasticity in the striatum during sensorimotor learning.
Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge 02139.
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Aosaki
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Graybiel
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Kimura
D015632:1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine / Q000494:pharmacology; D000200:Action Potentials / Q000187:drug effects; D000818:Animals; D001058:Apomorphine / Q000494:pharmacology; D001522:Behavior, Animal / Q000187:drug effects; D003214:Conditioning, Classical; D003342:Corpus Striatum / Q000166:cytology / Q000502:physiology*; D004298:Dopamine / Q000502:physiology*; D006220:Haloperidol / Q000494:pharmacology; D008251:Macaca; D008297:Male; D009473:Neuronal Plasticity; D009474:Neurons / Q000187:drug effects / Q000502:physiology*; D013378:Substantia Nigra / Q000166:cytology / Q000502:physiology
D015632:1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine; D006220:Haloperidol; D001058:Apomorphine; D004298:Dopamine