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The Cognitive Profile of Atypical Parkinsonism: A Meta-Analysis

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Abstract

Atypical Parkinsonism (AP) syndromes are characterized by a wide spectrum of non-motor symptoms including prominent attentional and executive deficits. However, the cognitive profile of AP and its differences and similarities with that of Parkinson’s Disease (PD) are still a matter of debate. The present meta-analysis aimed at identifying patterns of cognitive impairment in AP by comparing global cognitive functioning, memory, executive functions, visuospatial abilities, language, non-verbal reasoning, and processing speed test performances of patients with AP relative to healthy controls and patients with PD. All investigated cognitive domains showed a substantial impairment in patients with AP compared to healthy controls. When AP syndromes were considered separately, their cognitive functioning was distributed along a continuum from Multiple Systemic Atrophy at one extreme, with the least impaired cognitive profile (similar to that observed in PD) to Progressive Supranuclear Palsy, with the greatest decline in global cognitive and executive functioning (similar to Corticobasal Syndrome). These findings indicate that widespread cognitive impairment could represent an important clinical indicator to distinguish AP from other movement disorders.

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Data from the included primary studies is available in the supplementary tables and figures.

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This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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Conceptualization and Design: Simona Raimo, Mariachiara Gaita, Maria Cropano, Giusi Mautone, Alfonsina D’Iorio; Acquisition of Data: Simona Raimo, Mariachiara Gaita, Maria Cropano, Giusi Mautone; Formal analysis and investigation: Simona Raimo, Mariachiara Gaita, Maria Cropano, Giusi Mautone, Luigi Trojano, Gabriella Santangelo; Writing—original draft preparation: Simona Raimo, Mariachiara Gaita, Maria Cropano, Alfonsina D’Iorio; Writing—review and editing: Simona Raimo, Mariachiara Gaita, Maria Cropano, Luigi Trojano, Gabriella Santangelo.

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Correspondence to Simona Raimo.

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Raimo, S., Gaita, M., Cropano, M. et al. The Cognitive Profile of Atypical Parkinsonism: A Meta-Analysis. Neuropsychol Rev 33, 514–543 (2023). https://doi.org/10.1007/s11065-022-09551-6

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  • DOI: https://doi.org/10.1007/s11065-022-09551-6

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