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• W3173608506 abstract "Parkinson disease (PD) is characterized by motor deficits related to structural changes in the basal ganglia-thalamocortical circuits. However, it is still unclear the exact nature of the association between grey matter alterations and motor symptoms. Therefore, the aim of our investigation was to identify the subcortical modifications associated with motor symptoms of PD over time - adopting voxel-based morphometry (VBM) and automated volumetry methods. We selected fifty subjects with PD from the Parkinson’s Progression Markers Initiative (PPMI) database, who performed an MRI session at two time points: at baseline (i.e. at maximum 2 years after clinical diagnosis of PD) and after 48 months. Motor symptoms were assessed using the part III of the Unified Parkinson’s Disease Rating Scale at the two time points. Our VBM and volumetric analyses showed a general atrophy in all subcortical regions when comparing baseline with 48 months. These findings confirmed previous observations indicating a subcortical alteration over time in PD. Furthermore, our findings supported the idea that a reduced volume in the thalamus and an increased volume in pallidum may be related to the decline in motor skills. These structural modifications are in accordance with the functional model of the basal ganglia-thalamocortical circuits controlling movements. Moreover, VBM and volumetry provided partially overlapping results, suggesting that these methods might capture complementary aspects of brain degeneration in PD." @default.
• W3173608506 created "2021-07-05" @default.
• W3173608506 creator A5023858188 @default.
• W3173608506 creator A5052227924 @default.
• W3173608506 date "2021-01-01" @default.
• W3173608506 modified "2023-10-03" @default.
• W3173608506 title "Subcortical grey matter changes associated with motor symptoms evaluated by the Unified Parkinson’s disease Rating Scale (part III): A longitudinal study in Parkinson’s disease" @default.
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• W3173608506 doi "https://doi.org/10.1016/j.nicl.2021.102745" @default.
• W3173608506 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8264213" @default.
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