The clinical features of human immunodefiency virus (HIV) dementia exhibit the hallmarks of a subcortical dementia. These features include psychomotor slowing, apathy, bradykinesia and altered posture and gait similar to those observed in advanced Parkinson's disease. The dementia has the hallmarks attributed to subcortical dementia. The exquisite sensitivity of many of these patients to dopamine receptor blockade suggested a profound and, perhaps, selective abnormality of striatal dopaminergic systems. Additional investigations, electrophysiological, pathological, virological, metabolic and radiological studies, indicate that the basal ganglia are a major target of HIV infection. In this review, we describe the evidence for involvement of basal ganglia and, in particular, the dopaminergic systems, in HIV dementia. We also suggest novel therapeutic strategies that may be beneficial in the treatment of this disorder.
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