We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Pattern of Reduced Functional Connectivity and Structural Abnormalities in Parkinson's Disease: An Exploratory Study.
- Authors
Paes Guimarães, Rachel; Arci Santos, Maria Cristina; Dagher, Alain; Soares Campos, Lidiane; Azevedo, Paula; Gonzaga Piovesana, Luiza; Machado De Campos, Brunno; Larcher, Kevin; Zeighami, Yashar; Scarparo Amato-Filho, Augusto C.; Cendes, Fernando; Frota D'Abreu, Anelyssa Cysne
- Abstract
Background: MRI brain changes in Parkinson's disease (PD) are controversial. Objectives: We aimed to describe structural and functional changes in PD. Methods: 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.
- Subjects
PARKINSON'S disease; BRAIN imaging; MAGNETIC resonance imaging
- Publication
Frontiers in Neurology, 2017, Vol 7, p1
- ISSN
1664-2295
- Publication type
Article
- DOI
10.3389/fneur.2016.00243