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Enhancement of amphetamine-induced locomotor activity and dopamine release in nucleus accumbens following excitotoxic lesions of the hippocampus

Wilkinson, Lawrence Stephen, Mittleman, G., Torres, E., Humby, T., Hall, F. S. and Robbins, T. W. 1993. Enhancement of amphetamine-induced locomotor activity and dopamine release in nucleus accumbens following excitotoxic lesions of the hippocampus. Behavioural Brain Research 55 (2) , pp. 143-150.

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Abstract

This study tested the hypothesis that the hippocampus modulates dopamine-dependent function of the nucleus accumbens using behavioural and neurochemical evidence. Rats with bilateral lesions of the hippocampus induced by colchicine and kainic acid exhibited equivalent levels of spontaneous locomotor activity but a potentiation of the hyperactivity produced, dose-dependently, by D-amphetamine measured in photo-cell activity cages. The same rats subsequently received unilateral implantations of a microdialysis probe aimed at the nucleus accumbens and showed elevated levels of extracellular dopamine in response to D-amphetamine but no significant difference in basal values in comparison with sham-operated controls. The results are discussed in terms of functional interactions between the hippocampus and nucleus accumbens involving the control of mesolimbic dopamine release.

Item Type: Article
Date Type: Publication
Status: Published
Schools: MRC Centre for Neuropsychiatric Genetics and Genomics (CNGG)
Medicine
Neuroscience and Mental Health Research Institute (NMHRI)
Psychology
Subjects: R Medicine > R Medicine (General)
Publisher: Elsevier
ISSN: 0166-4328
Last Modified: 04 Jun 2017 08:49
URI: http://orca-mwe.cf.ac.uk/id/eprint/85442

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