Gray matter atrophy patterns within the cerebellum-neostriatum-cortical network in SCA3.
Aged
Atrophy
/ pathology
Cerebellum
/ diagnostic imaging
Cerebral Cortex
/ diagnostic imaging
Disease Progression
Female
Gray Matter
/ diagnostic imaging
Humans
Machado-Joseph Disease
/ diagnostic imaging
Magnetic Resonance Imaging
Male
Middle Aged
Neostriatum
/ diagnostic imaging
Nerve Net
/ diagnostic imaging
Neuroimaging
/ methods
Severity of Illness Index
Journal
Neurology
ISSN: 1526-632X
Titre abrégé: Neurology
Pays: United States
ID NLM: 0401060
Informations de publication
Date de publication:
01 12 2020
01 12 2020
Historique:
received:
28
11
2019
accepted:
22
07
2020
pubmed:
8
10
2020
medline:
17
12
2020
entrez:
7
10
2020
Statut:
ppublish
Résumé
To investigate the spatial patterns and the probable sequences of gray matter atrophy in spinocerebellar ataxia type 3 (SCA3). A total of 47 patients with SCA3 and 49 age- and sex-matched healthy controls participated in the study. High-resolution T1-weighted MRI were examined in all participants. We used the causal network of structural covariance (CasCN) to identify the sequence of gray matter atrophy patterns. This was achieved by applying Granger causality analysis to a gray matter atrophy staging scheme performed by voxel-based morphometry from the network level. Participants in the premanifest stage of the disease showed the presence of focal gray matter atrophy in the vermis. As the disease duration increased, there was progressive gray matter atrophy in the cerebellar, neostriatum, frontal lobe, and parietal lobe. The patients with SCA3 also showed proximal and distal cortical atrophy sequences exerting from the vermis to the regions mainly located in the cerebellum-neostriatum-cortical network. Our results, although preliminary in nature, indicate that the gray matter atrophy in SCA3 lies and extends to involve more regions according to distinct anatomical patterns, mainly in the cerebellum-neostriatum-cortical network. These findings advance our understanding on the natural history of structural damage in SCA3, while confirming known clinical features. This could provide unique insight into the ordered sequential process of regional brain atrophy that targets a particular network.
Identifiants
pubmed: 33024025
pii: WNL.0000000000010986
doi: 10.1212/WNL.0000000000010986
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
e3036-e3044Informations de copyright
© 2020 American Academy of Neurology.