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- Title
Structural brain heterogeneity underlying symptomatic and asymptomatic genetic dystonia: a multimodal MRI study.
- Authors
Tomić, Aleksandra; Sarasso, Elisabetta; Basaia, Silvia; Dragašević-Misković, Nataša; Svetel, Marina; Kostić, Vladimir S.; Filippi, Massimo; Agosta, Federica
- Abstract
Background: Most of DYT genotypes follow an autosomal dominant inheritance pattern with reduced penetrance; the mechanisms underlying the disease development remain unclear. The objective of the study was to investigate cortical thickness, grey matter (GM) volumes and white matter (WM) alterations in asymptomatic (DYT-A) and symptomatic dystonia (DYT-S) mutation carriers. Methods: Eight DYT-A (four DYT-TOR1A and four DYT-THAP1), 14 DYT-S (seven DYT-TOR1A, and seven DYT-THAP1), and 37 matched healthy controls underwent 3D T1-weighted and diffusion tensor (DT) MRI to study cortical thickness, cerebellar and basal ganglia GM volumes and WM microstructural changes. Results: DYT-S showed thinning of the frontal and motor cortical regions related to sensorimotor and cognitive processing, together with putaminal atrophy and subcortical microstructural WM damage of both motor and extra-motor tracts such as cerebral peduncle, corona radiata, internal and external capsule, temporal and orbitofrontal WM, and corpus callosum. DYT-A had cortical thickening of middle frontal areas and WM damage of the corona radiata. Conclusions: DYT genes phenotypic expression is associated with alterations of both motor and extra-motor WM and GM regions. Asymptomatic genetic status is characterized by a very subtle affection of the WM motor pathway, together with an increased cortical thickness of higher-order frontal regions that might interfere with phenotypic presentation and disease manifestation.
- Subjects
EFFERENT pathways; DYSTONIA; MAGNETIC resonance imaging; CORPUS callosum; WHITE matter (Nerve tissue); AGENESIS of corpus callosum; GROSS motor ability; SENSORY conflict
- Publication
Journal of Neurology, 2024, Vol 271, Issue 4, p1767
- ISSN
0340-5354
- Publication type
Article
- DOI
10.1007/s00415-023-12098-y