Abstract
Objectives
To compare spatial patterns of cortical thickness alterations in neuromyelitis optica (NMO) and multiple sclerosis (MS); and to investigate the correlations between cortical thinning and clinical variables in NMO and MS.
Methods
We studied 23 patients with NMO, 27 patients with MS and 26 healthy controls (HCs). The global, brain region and vertex-based cortical thickness (CTh) were analysed and compared among the three groups. A general linear model was used to investigate the correlations between cortical thinning and clinical measures.
Results
A limited number of cortical regions in visual cortex were found to be significantly thinner in NMO patients than in HCs. The MS patients exhibited more widespread cortical thinning compared with HCs, and significantly greater cortical thinning in the insula and the parahippocampus compared with NMO. The extent of cortical thinning in several brain regions correlated with cognitive measures in MS, but not in NMO.
Conclusions
Neocortical thinning in NMO mainly affects visual cortex, while MS patients show much more extensive cortical thinning. Cognitive changes are correlated with cortical atrophy in MS not in NMO. The substrates of cognitive changes in MS and NMO could therefore be different.
Key Points
• MS patients show much more extensive cortical thinning than NMO.
• Cortical thinning of insula and parahippocampus particularly distinguishes MS from NMO.
• Cognitive changes are correlated with cortical atrophy in MS but not in NMO.
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Abbreviations
- CTh:
-
Cortical thickness
- HC:
-
Healthy control
- MS:
-
Multiple sclerosis
- NMO:
-
Neuromyelitis optica
- WM:
-
White matter
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Acknowledgments
We would like to thank Dr. Alan Evans for kindly providing the MNI CIVET software.
The scientific guarantor of this publication is Kuncheng Li. The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article. This study has received funding by the McDonald Fellowship from Multiple Sclerosis International Federation (Y.L.), 973 Program (2013CB837300), the National Science Foundation of China (Nos. 81101038,30930029, 30800267, 81000633 and 81030028), the National Science Fund for Distinguished Young Scholars (No. 81225012), the Beijing Natural Science fund (No.7133244), the Beijing Funding for Training Talents (Y.H.), Major Project of National Social Science Foundation (No. 11&ZD186) and Beijing Nova Program (No. xx2013045). Dr Ni Shu and Dr. Teng Xie have significant statistical expertise. Institutional Review Board approval was obtained. Written informed consent was obtained from all subjects (patients) in this study. Methodology: prospective, cross sectional study, performed at one institution.
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Yaou Liu and Teng Xie contributed equally to this work.
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Liu, Y., Xie, T., He, Y. et al. Cortical Thinning Correlates with Cognitive Change in Multiple Sclerosis but not in Neuromyelitis Optica. Eur Radiol 24, 2334–2343 (2014). https://doi.org/10.1007/s00330-014-3239-1
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DOI: https://doi.org/10.1007/s00330-014-3239-1