Journal
FRONTIERS IN NEUROSCIENCE
Volume 14, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fnins.2020.543802
Keywords
blepharospasm; cortical thickness; diffusion tensor imaging; fractional anisotropy; local diffusion homogeneity
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Funding
- National Key R&D Program of China [2017YFC1307500]
- National Natural Science Foundation of China [81571107, 81600998, 81771137, 81971103]
- Natural Science Foundation of Guangdong Province [2016A030310132, 2017A030310523]
- Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence Fund [2019013]
- Sun Yat-sen University Clinical Research 5010 Program [2018001]
- Scientific and Technical Project of Guangdong Province [2019A030317006]
- Southern China International Cooperation Base for Early Intervention and Functional Rehabilitation of Neurological Diseases [2015B050501003]
- Guangdong Provincial Engineering Center For Major Neurological Disease Treatment
- Guangdong Provincial Translational Medicine Innovation Platform for Diagnosis and Treatment ofMajor Neurological Disease
- Guangdong Provincial Clinical Research Center for Neurological Diseases
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White matter abnormalities in blepharospasm (BSP) have been evaluated using conventional intra-voxel metrics, and changes in patterns of cortical thickness in BSP remain controversial. We aimed to determine whether local diffusion homogeneity, an inter-voxel diffusivity metric, could be valuable in detecting white matter abnormalities for BSP; whether these changes are related to disease features; and whether cortical thickness changes occur in BSP patients. Diffusion tensor and structural magnetic resonance imaging were collected for 29 patients with BSP and 30 healthy controls. Intergroup diffusion differences were compared using tract-based spatial statistics analysis and measures of cortical thickness were obtained. The relationship among cortical thickness, diffusion metric in significantly different regions, and behavioral measures were further assessed. There were no significant differences in cortical thickness and fractional anisotropy between the groups. Local diffusion homogeneity was higher in BSP patients than controls, primarily in the left superior longitudinal fasciculus, corpus callosum, left posterior corona radiata, and left posterior thalamic radiata (P 0.05, family-wise error corrected). The local diffusion homogeneity values in these regions were positively correlated with the Jankovic rating scale (r(s) = 0.416, P = 0.031) and BSP disability index (r(s) = 0.453, P = 0.018) in BSP patients. These results suggest that intra- and inter-voxel diffusive parameters are differentially sensitive to detecting BSP-related white matter abnormalities and that local diffusion homogeneity might be useful in assessing disability in BSP patients.
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