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• W2948362022 abstract "Objective A major contributor to dementia in Parkinson disease (PD) is degeneration of the cholinergic basal forebrain. This study determined whether cholinergic nucleus 4 (Ch4) density is associated with cognition in early and more advanced PD. Methods We analysed brain MRIs and neuropsychological test scores for 228 newly diagnosed PD participants from the Parkinson’s Progression Markers Initiative (PPMI), 101 healthy controls from the PPMI and 125 more advanced PD patients from a local retrospective cohort. Cholinergic basal forebrain nuclei densities were determined by applying probabilistic maps to MPRAGE T1 sequences processed using voxel-based morphometry methods. Relationships between grey matter densities and cognitive scores were analysed using correlations and linear regression models. Results In more advanced PD, greater Ch4 density was associated with Montreal Cognitive Assessment (MoCA) score (β=14.2; 95% CI=1.5 to 27.0; p=0.03), attention domain z-score (β=3.2; 95% CI=0.8 to 5.5; p=0.008) and visuospatial domain z-score (β=7.9; 95% CI=2.0 to 13.8; p=0.009). In the PPMI PD cohort, higher Ch4 was associated with higher scores on MoCA (β=9.2; 95% CI=1.9 to 16.5; p=0.01), Judgement of Line Orientation (β=20.4; 95% CI=13.8 to 27.0; p<0.001), Letter Number Sequencing (β=16.5; 95% CI=9.5 to 23.4; p<0.001) and Symbol Digit Modalities Test (β=41.8; 95% CI=18.7 to 65.0; p<0.001). These same relationships were observed in 97 PPMI PD participants at 4 years. There were no significant associations between Ch4 density and cognitive outcomes in healthy controls. Conclusion In de novo and more advanced PD, lower Ch4 density is associated with impaired global cognition, attention and visuospatial function." @default.
• W2948362022 created "2019-06-14" @default.
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• W2948362022 date "2019-06-07" @default.
• W2948362022 modified "2023-10-01" @default.
• W2948362022 title "Lower volume, more impairment: reduced cholinergic basal forebrain grey matter density is associated with impaired cognition in Parkinson disease" @default.
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• W2948362022 doi "https://doi.org/10.1136/jnnp-2019-320450" @default.
• W2948362022 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31175168" @default.
• W2948362022 hasPublicationYear "2019" @default.
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