Open AccessPatterns of gray matter atrophy in atypical parkinsonism syndromes: a VBM meta‐analysis
Author(s) -
Yu Fang,
Barron Daniel S.,
Tantiwongkosi Bundhit,
Fox Peter
Publication year - 2015
Publication title -
brain and behavior
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.915
H-Index - 41
ISSN - 2162-3279
DOI - 10.1002/brb3.329
Subject(s) - atrophy , progressive supranuclear palsy , corticobasal degeneration , putamen , voxel based morphometry , parkinsonism , pathology , insula , medicine , thalamus , grey matter , neuroscience , psychology , magnetic resonance imaging , disease , white matter , radiology
Background and Purpose Accurate diagnosis of Atypical Parkinsonian Syndromes ( APS ) is important due to differences in prognosis and management, but remains a challenge in the clinical setting. The purpose of our meta‐analysis was to identify characteristic patterns of gray matter atrophy in Corticobasal Degeneration ( CBD ), Progressive Supranuclear Palsy ( PSP ), Multisystem‐Atrophy Parkinsonian type ( MSA ‐P), and Idiopathic Parkinson's Disease ( IPD ). Materials and Methods Whole‐brain meta‐analysis was performed on 39 published voxel‐based morphometry ( VBM ) articles (consisting of 404 IPD , 87 MSA ‐P, 165 CBD , and 176 PSP subjects) using the modified Anatomic Likelihood Estimation method. Based on these results, contrast analyses were then utilized to determine areas of atrophy shared by as well as unique to each disorder. Results CBD was characterized by asymmetric gray matter atrophy in multiple cortical regions, while the thalamus‐midbrain and insula were predominantly involved in PSP . The striatum and superior cerebellum were affected in MSA ‐P, while IPD demonstrated an anterior cerebral pattern. Although there was a mild overlap among PSP , CBD , and MSA ‐P, significant regions of atrophy unique to each disorder were identified, including (1) the superior parietal lobule in CBD (2) putamen in MSA ‐P (3) insula and medial dorsal nucleus in PSP . Conclusion Our results suggest that there are characteristic patterns of atrophy in APS . Guided by these findings, future studies on the individual subject level may lead to the development of robust imaging biomarkers.