視神経脊髄炎スペクトラム障害患者における小脳の微細構造および機能的結合の変化と認知機能との相関：女性優位のマルチモーダルMRI研究
Yingyu Zhang1, Zhaoshi Zheng1, Linfang Li2
1First Department of Neurology, China-Japan Union Hospital of Jilin University, Changchun, Jilin Province, China.
Background:
The cerebellum's role in neuromyelitis optica spectrum disorder (NMOSD) remains inadequately explored, despite its known contributions to cognition and motor function.
Methods:
This multimodal neuroimaging study integrated voxel-based morphometry (VBM), resting-state functional MRI (fMRI), and diffusion tensor imaging (DTI) to characterize cerebellar gray matter volume (GMV), microstructure, and functional connectivity (FC) in 29 NMOSD patients and 25 matched healthy controls. Clinical assessments included the Expanded Disability Status Scale (EDSS) and Montreal Cognitive Assessment (MoCA).
Results:
Patients exhibited significant cerebellar alterations, including GMV reduction in bilateral lobules VI/VIII and the vermis, decreased fractional anisotropy in Crus I, and altered FC between Crus I and occipital/frontal regions. Critically, the structural and microstructural impairments correlated with higher EDSS scores (* p < 0.05), while FC changes were associated with lower MoCA scores.
Conclusion:
These findings implicate the cerebellum in both motor disability and cognitive impairment in NMOSD, providing novel evidence for cerebellar pathology as a contributor to disease progression.
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