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J Neurol Neurosurg Psychiatry. 1991 October; 54(10): 898–904.
PMCID: PMC1014575

Striatal blood flow, glucose metabolism and 18F-dopa uptake: difference in Parkinson's disease and atypical parkinsonism.


Striatal blood flow, glucose metabolism and 18F-Dopa uptake were studied with positron emission tomography (PET) in eight non-demented patients with idiopathic Parkinson's disease and eight with atypical Parkinsonism. Patients with atypical Parkinsonism had no specific cause for the Parkinsonian symptoms and were clinically different from Parkinson's disease with lack of resting tremor and a poor response to dopaminergic drugs. Decreased 18F-Dopa uptake in the putamen was observed in patients with Parkinson's disease and atypical Parkinsonism compared with normal controls. 18F-Dopa uptake in the head of the caudate was also significantly reduced in both conditions but relatively less in Parkinson's disease. Decreased blood flow and glucose metabolism in the striatum associated with a global cerebral decrease were also observed in patients with atypical Parkinsonism compared with controls, while they were preserved in patients with Parkinson's disease, indicating affected neurons not only in the striatum but also in the cerebrum in patients with atypical Parkinsonism compared with patients with Parkinson's disease. The differences in the caudate 18F-Dopa uptake, and blood flow and glucose metabolism in the cerebrum including the striatum between Parkinson's disease and atypical Parkinsonism assessed by PET may be due to the differences in the pathophysiological mechanism between Parkinson's disease and atypical Parkinsonism.

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