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Huntington's disease is a genetically inherited neurodegenerative disorder for which currently there is no effective treatment or cure. In order to gauge the potential therapeutic benefits of neuroprotective or restorative treatments, it is necessary to create an animal model that is associated with readily measurable and long-lasting functional impairments. The undifferentiated neostriatum and limited behavioural repertoire of rodents have led to the extension of our investigations into the common marmoset. We have used quinolinic acid to create unilateral excitotoxic lesions of the caudate nucleus or the putamen in this small non-human primate. Following rigorous investigation of each monkey on a battery of behavioural tests, we found that the unilateral putamen lesion was associated with a contralateral motor impairment that persisted for at least 9 months and withstood repeated testing. However, the unilateral caudate nucleus lesion did not appear to be associated with any detectable motor deficit. The stability and the reproducibility of the unilateral putamen lesion in the marmoset provide a suitable tool for the investigation of potential treatments for neurodegenerative disorders that attack this region of the brain.

The influence of excitotoxic basal ganglia lesions on motor performance in the common marmoset