Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/161638
Title: Structural MRI correlates of the MMSE and pentagon copying test in Parkinson's disease
Author: García Díaz, Anna I.
Segura i Fàbregas, Bàrbara
Baggio, Hugo César
Martí Domènech, Ma. Josep
Valldeoriola Serra, Francesc
Compta, Yaroslau
Vendrell i Gómez, Pere
Bargalló Alabart, Núria
Tolosa, Eduardo
Junqué i Plaja, Carme, 1955-
Keywords: Imatges per ressonància magnètica
Malaltia de Parkinson
Trastorns de la cognició
Envelliment cerebral
Magnetic resonance imaging
Parkinson's disease
Cognition disorders
Aging brain
Issue Date: 19-Oct-2014
Publisher: Elsevier B.V.
Abstract: BACKGROUND: Cognitive impairment in Parkinson's disease (PD) is common and recent studies have focused on addressing the most suitable screening tool for its assessment. MMSE is commonly used in clinical practice and longitudinal studies found a relationship between the MMSE pentagon copying item and progression to dementia, but its neuroanatomical correlates have been poorly investigated. The aim of this study is to investigate the MRI structural correlates of the global MMSE and the pentagon item scores in PD patients in the absence of dementia. METHODS: We selected a sample of 92 PD patients and 36 controls. MMSE was used as a global measure of cognitive status, and the pentagon copying test as a measure of visuospatial performance. FreeSurfer software was used to assess intergroup differences in cortical thickness (CTh) and global atrophy measures, as well as their relationship with cognitive performance. RESULTS: Compared to controls, patients showed significant differences in measures of global atrophy, which correlated with performance on MMSE and the pentagon item. Regional differences in CTh were seen between PD patients and controls bilaterally in the temporo-parietal-occipital region. Patients with impaired performance compared with those of normal performance also showed CTh reductions in these regions. CONCLUSION: Our results suggest MMSE and the pentagon item reflect brain changes which at a regional level involve mainly posterior regions. Correlates of the pentagon item were seen in the same regions where PD patients exhibited significant thinning, and involved more areas and bigger cluster sizes than the correlates of MMSE global scores.
Note: Versió postprint del document publicat a: https://doi.org/10.1016/j.parkreldis.2014.10.014
It is part of: Parkinsonism & Related Disorders, 2014, vol. 20, num. 12, p. 1405-1410
URI: http://hdl.handle.net/2445/161638
Related resource: https://doi.org/10.1016/j.parkreldis.2014.10.014
ISSN: 1353-8020
Appears in Collections:Articles publicats en revistes (IDIBAPS: Institut d'investigacions Biomèdiques August Pi i Sunyer)
Articles publicats en revistes (Medicina)

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