Sensory stimulation accelerates dopamine release in the basal ganglia.
Brain Res
; 1026(2): 179-84, 2004 Nov 12.
Article
em En
| MEDLINE
| ID: mdl-15488479
ABSTRACT
We report herein the modulation of dopamine release in the basal ganglia during peripheral electrical stimulation in animals. The endogenous dopamine release during electrical stimulation was measured in anesthetized cats by positron emission tomography (PET) using the D2 receptor agonist [11C]-raclopride. Binding potential (BP) parametric maps were calculated using a simplified reference region model. The regional dopamine release evoked by electrical stimulation was estimated both by region of interest (ROI) analysis and statistical parametric mapping (SPM 99). Both ROI analysis and statistical parametric mapping showed significant release of endogenous dopamine in the nucleus accumbens and the striatum contralateral to the stimulated side as compared to the resting condition as well as the ipsilateral side. Accordingly, we suggest that the activity of the dopaminergic neurons in the midbrain projecting to the nucleus accumbens and the striatum is modulated by the input from the afferent nerves. This provides an in vivo evidence for the importance of the basal ganglia in the processing of peripheral information required for normal movement. This may also explain the clinically observed sensory system abnormalities in patients with movement disorders.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Gânglios da Base
/
Dopamina
/
Estimulação Elétrica
Limite:
Animals
Idioma:
En
Ano de publicação:
2004
Tipo de documento:
Article