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• W2979627225 abstract "Both functional connectivity (FC) and blood oxygen level-dependent (BOLD) signal variability (SDBOLD) are methods that are used for examining the physiological state of the brain. Although they are derived from signal changes and are related, a few studies have explored their relationship. Here, we examined the relationship between SDBOLD and FC within the default mode network (DMN) in healthy aging participants and those with Parkinson's disease (PD) ON and OFF dopaminergic medications. Dopaminergic medications had profound effects on both DMN FC and SDBOLD measured separately in PD. Analyzing DMN FC and SDBOLD in a joint independent component analysis, we identified joint components of DMN FC and SDBOLD that were separately associated with measurements of motor and cognitive impairment in PD and qualitatively similar to those in healthy aging. Dopaminergic medications had a differential effect on these components depending on these measures of disease severity, normalizing the relationships. Importantly, we show that dopaminergic medication status matters in imaging PD, and it can affect both connectivity and SDBOLD. Imaging PD ON may lead to inflated estimates of SDBOLD and diminish the ability to measure changes associated with declining motor and cognitive capacities." @default.
• W2979627225 created "2019-10-18" @default.
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• W2979627225 date "2019-09-01" @default.
• W2979627225 modified "2023-09-26" @default.
• W2979627225 title "Effect of Dopaminergic Medications on Blood Oxygen Level-Dependent Variability and Functional Connectivity in Parkinson's Disease and Healthy Aging" @default.
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• W2979627225 doi "https://doi.org/10.1089/brain.2019.0677" @default.
• W2979627225 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6727479" @default.
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• W2979627225 hasPublicationYear "2019" @default.
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