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Title: Mild cognitive impairment in Parkinson's disease: A distinct clinical entity?
Authors: Wen M.-C. 
Chan L.L. 
Tan L.C.S. 
Tan E.K. 
Keywords: Alzheimer disease
Cognitive reserve
Lewy body
Mild cognitive impairment
Neuropsychiatric comorbidities
Parkinson's disease
Issue Date: 2017
Publisher: BioMed Central Ltd.
Citation: Wen M.-C., Chan L.L., Tan L.C.S., Tan E.K. (2017). Mild cognitive impairment in Parkinson's disease: A distinct clinical entity?. Translational Neurodegeneration 6 (1) : 24. ScholarBank@NUS Repository.
Abstract: Background: Mild cognitive impairment in Parkinson's disease (PD-MCI) is a common clinical condition. Understanding its pathology and clinical features is important for early intervention before the onset of dementia. In the past, variable definitions and differences in neuropsychological batteries generated divergent results of the affected cognitive patterns. Main body: The introduction of PD-MCI criteria by the Movement Disorders Society (MDS) Task Force provides a more uniform system for defining and measuring PD-MCI and may improve the validity of future research. PD-MCI is likely to be heterogeneous since it can coexist with Alzheimer's disease and/ or Lewy body pathologies in PD. Pathogeneses of neuropsychiatric disturbances, such as depression, anxiety and apathy, are associated with PD with or without MCI. In addition, cognitive reserve formed by patients' unique life experiences may influence the outward cognitive performance despite the presence of the aforementioned pathogeneses and hence alter the diagnosis of MCI. Conclusion: The overlap of cognitive impairment across different neurodegenerative diseases suggests that PD-MCI is likely to result from a mixture of complex pathophysiologies, rather than being a distinct pathologic entity. Differentiating MCI from other organic symptoms in PD would facilitate novel therapeutic strategies. © 2017 The Author(s).
Source Title: Translational Neurodegeneration
ISSN: 20479158
DOI: 10.1186/s40035-017-0094-4
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