Please use this identifier to cite or link to this item:
Type: Artigo
Title: Pattern of reduced functional connectivity and structural abnormalities in parkinson's disease: an exploratory study
Author: Guimaraes, Rachel Paes
Arci Santos, Maria Cristina
Dagher, Alain
Campos, Lidiane Soares
Azevedo, Paula
Piovesana, Luiza Gonzaga
De Campos, Brunno Machado
Larcher, Kevin
Zeighami, Yashar
Scarparo Amato-Filho, Augusto C.
Cendes, Fernando
Frota D'Abreu, Anelyssa Cysne
Abstract: MRI brain changes in Parkinson's disease (PD) are controversial. We aimed to describe structural and functional changes in PD. Sixty-six patients with PD (57.94 +/- 10.25 years) diagnosed according to the UK Brain Bank criteria were included. We performed a whole brain analysis using voxel-based morphometry (VBM-SPM 8 software), cortical thickness (CT) using CIVET, and resting-state fMRI using the Neuroimaging Analysis Kit software to compare patients and controls. For VBM and CT we classified subjects into three groups according to disease severity: mild PD [Hoehn and Yahr scale (HY) 1-1.5], moderate PD (HY 2-2.5), and severe PD (HY 3-5). Results: We observed gray matter atrophy in the insula and inferior frontal gyrus in the moderate PD and in the insula, frontal gyrus, putamen, cingulated, and paracingulate gyri in the severe groups. In the CT analysis, in mild PD, cortical thinning was restricted to the superior temporal gyrus, gyrus rectus, and olfactory cortex; in the moderate group, the postcentral gyrus, supplementary motor area, and inferior frontal gyrus were also affected; in the severe PD, areas such as the precentral and postentral gyrus, temporal pole, fusiform, and occipital gyrus had reduced cortical thinning. We observed altered connectivity at the default mode, visual, sensorimotor, and cerebellar networks. Conclusion: Subjects with mild symptoms already have cortical involvement; however, further cerebral involvement seems to follow Braak's proposed mechanism. Similar regions are affected both structurally and functionally. We believe the combination of different MRI techniques may be useful in evaluating progressive brain involvement and they may eventually be used as surrogate markers of disease progression
Subject: Doença de Parkinson
Country: Suíça
Editor: Frontiers Research Foundation
Rights: Aberto
Identifier DOI: 10.3389/fneur.2016.00243
Date Issue: 2017
Appears in Collections:FCM - Artigos e Outros Documentos

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.