Cortical hypometabolism assessed by a metabolic ratio in Parkinson's disease primarily reflects cognitive deterioration—[18F]FDG‐PET
Identifieur interne : 001565 ( Istex/Curation ); précédent : 001564; suivant : 001566Cortical hypometabolism assessed by a metabolic ratio in Parkinson's disease primarily reflects cognitive deterioration—[18F]FDG‐PET
Auteurs : Inga Liepelt [Allemagne] ; Matthias Reimold [Allemagne] ; Walter Maetzler [Allemagne] ; Jana Godau [Allemagne] ; Gerald Reischl [Allemagne] ; Alexandra Gaenslen [Allemagne] ; Heinz Herbst [Allemagne] ; Daniela Berg [Allemagne]Source :
- Movement Disorders [ 0885-3185 ] ; 2009-07-30.
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Abstract
In Parkinson's disease patients with cognitive deterioration, regional cortical hypometabolism has been observed with [18F]fluorodeoxyglucose‐positron emission tomography (FDG‐PET). Our aim was to develop a robust method to subsume the overall degree of metabolic deterioration in Parkinson's disease by means of a single index and to investigate which of the clinical features correlates best with hypometabolism. Twenty‐two Parkinson's patients (10 demented) and seven controls underwent FDG‐PET. A metabolic index (mean relative uptake in typically affected regions) was calculated for each patient and compared with scores for cognition [Minimental State Examination (MMSE)], motor performance [Unified Parkinson's Disease Rating Scale (UPDRS III)” and behavior (Neuropsychiatric Inventory). In stepwise linear regression analysis, MMSE (P < 0.001) score showed the only significant effect. Estimated sensitivity and specificity for DSM‐IV diagnosis of dementia were high for the metabolic index (MI), with 91 and 100%. Taken together, the presented data indicate that cerebral hypometabolism in Parkinson's disease is primarily associated with cognitive impairment. © 2009 Movement Disorder Society
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DOI: 10.1002/mds.22662
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<front><div type="abstract" xml:lang="en">In Parkinson's disease patients with cognitive deterioration, regional cortical hypometabolism has been observed with [18F]fluorodeoxyglucose‐positron emission tomography (FDG‐PET). Our aim was to develop a robust method to subsume the overall degree of metabolic deterioration in Parkinson's disease by means of a single index and to investigate which of the clinical features correlates best with hypometabolism. Twenty‐two Parkinson's patients (10 demented) and seven controls underwent FDG‐PET. A metabolic index (mean relative uptake in typically affected regions) was calculated for each patient and compared with scores for cognition [Minimental State Examination (MMSE)], motor performance [Unified Parkinson's Disease Rating Scale (UPDRS III)” and behavior (Neuropsychiatric Inventory). In stepwise linear regression analysis, MMSE (P < 0.001) score showed the only significant effect. Estimated sensitivity and specificity for DSM‐IV diagnosis of dementia were high for the metabolic index (MI), with 91 and 100%. Taken together, the presented data indicate that cerebral hypometabolism in Parkinson's disease is primarily associated with cognitive impairment. © 2009 Movement Disorder Society</div>
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