PMID: 6169401Nov 2, 1981Paper

Involvement of the thalamus in the asymmetric effects of unilateral sensory stimuli on the two nigrostriatal dopaminergic pathways in the cat

Brain Research
V LevielA Cheramy

Abstract

The effects of unilateral sensory stimuli on dopamine (DA) release from nerve terminals and dendrites of the two nigrostriatal dopaminergic pathways were estimated in halothane-anaesthetized cats without or with sagittal transections. In control animals, the electrical stimulation of the right forelimb enhanced DA release in the right caudate nucleus (CN) and decreased DA release in the right substantia nigra (SN). Opposite effects were observed in the contralateral structures. Sagittal transections of the corpus callosum and commissura anterior, or of the mesencephalic decussations or of the thalamic massa intermedia were made to investigate mechanisms involved in the reciprocal regulation of the two dopaminergic pathways. These sections were without effect on the spontaneous release of DA from nerve terminals and dendrites. The transection of the thalamic massa intermedia was the only one which interrupted the asymmetric changes in DA release induced by unilateral sensory stimuli; an increased dendritic release of DA was only seen in the left SN but it was significantly less pronounced than that observed in control cats. The other transections did not prevent the asymmetric changes in DA release evoked by the sensory stimulat...Continue Reading

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Citations

Nov 25, 1983·European Journal of Pharmacology·F DaudetC Barberis
Feb 24, 1984·Neuroscience Letters·E Rinvik
Jul 1, 1982·Brain Research Bulletin·G Arbuthnott, A K Wright
Dec 1, 1985·Brain Research Bulletin·I C KilpatrickM Summerhayes
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Oct 1, 1991·The Journal of Comparative Neurology·L S Allen, R A Gorski

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