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dc.contributor.authorHenderson, J.M.
dc.contributor.authorAnnett, L.E.
dc.contributor.authorRyan, L.
dc.contributor.authorChiang, W.
dc.contributor.authorHidaka, S.
dc.contributor.authorTorres, E.M.
dc.contributor.authorDunnett, S.B.
dc.identifier.citationHenderson , J M , Annett , L E , Ryan , L , Chiang , W , Hidaka , S , Torres , E M & Dunnett , S B 1999 , ' Subthalamic nucleus lesions induce deficits as well as benefits in the hemiparkinsonian rat ' , European Journal of Neuroscience , vol. 11 , no. 8 , pp. 2749-2757 .
dc.identifier.otherPURE: 192362
dc.identifier.otherPURE UUID: 2c5ea944-c9e6-4aa0-9aa5-72cde0e721e7
dc.identifier.otherdspace: 2299/3131
dc.identifier.otherScopus: 0032818071
dc.identifier.otherORCID: /0000-0003-2082-1650/work/62748263
dc.description" The definitive version is available at " Copyright Blackwell Publishing. DOI: 10.1046/j.1460-9568.1999.00692.x [Full text of this article is not available in the UHRA]
dc.description.abstractLesions of the subthalamic nucleus can restore some imbalances in motor output of the basal ganglia induced by nigrostriatal dopamine depletion, and have been proposed as a potential therapy for Parkinson’s disease. Although there is substantial supporting evidence from experimental studies in both rats and primates, there is less information on the effects of subthalamic lesions alone. In order to characterize potential side effects, the present study evaluates the behavioural effects of unilateral excitotoxic lesions of the subthalamic nucleus in rats that have previously received either unilateral saline or 6-hydroxydopamine injections into the nigrostriatal bundle on the same side. The 6-hydroxydopamine lesions induced ipsilateral orientation asymmetries in head position and body axis bias, rotational asymmetries following injections of direct or indirect dopamine agonists, neglect of contralateral stimuli, and a reduction in the numbers of pellets retrieved with the contralateral paw in a skilled reaching task. Subsequent excitotoxic lesions of the subthalamic nucleus reduced (but did not abolish) rotational asymmetries, had no effects on the measures of neglect and skilled paw-reaching, and produced contralateral orientation biases in head turning and body axis curling. Rats that received subthalamic lesions alone exhibited de novo impairments comprising contralateral biases in the orientation tests. These results support a neuromodulatory role of the subthalamic nucleus in regulating motor outputs of the basal ganglia, and caution that there may be distinct side effects of the lesion by itself. Whereas some impairments attributable to dopamine depletion may be alleviated by subthalamic manipulations, other symptoms are not, or may even be aggravated.en
dc.relation.ispartofEuropean Journal of Neuroscience
dc.titleSubthalamic nucleus lesions induce deficits as well as benefits in the hemiparkinsonian raten
dc.contributor.institutionDepartment of Psychology
dc.description.statusPeer reviewed
rioxxterms.typeJournal Article/Review

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