Aberrant Brain Regional Homogeneity and Functional Connectivity of Entorhinal Cortex in Vascular Mild Cognitive Impairment: A Resting-State Functional MRI Study

Frontiers in Neurology

Yanhui Yang¹  Yi Xu²  Jinliang Niu²  Dongfang Li³  Yanqing Han³  Man Li³  Xiaomin Zhang³  Xiuqin Jia⁴  Meimei Zuo⁶ 

[1] Beijing Key Laboratory of Magnetic Resonance Imaging and Brain Informatics, Beijing, China;Department of Image, The Second Affiliated Hospital of Shanxi Medical University, Taiyuan, China;Department of Neurology, The Second Affiliated Hospital of Shanxi Medical University, Taiyuan, China;Department of Radiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China;Department of Radiology, Xuanwu Hospital, Capital Medical University, Beijing, China;Medical Department, Cangzhou People's Hospital, Cangzhou, China;

关键词: vascular mild cognitive impairment;    entorhinal cortex;    resting-state functional MRI;    regional homogeneity;    functional connectivity;   

DOI  :  10.3389/fneur.2018.01177

来源: DOAJ

【 摘 要 】

The aim of this study was to investigate changes in regional homogeneity (ReHo) and the functional connectivity of the entorhinal cortex (EC) in vascular mild cognitive impairment (VaMCI) and to evaluate the relationships between such changes and neuropsychological measures in VaMCI individuals. In all, 31 patients with VaMCI and 32 normal controls (NCs) underwent rs-fMRI. Differences in whole-brain ReHo and seed-based bilateral EC functional connectivity (EC-FC) were determined. Pearson's correlation was used to evaluate the relationships between regions with significant group differences and different neuropsychological measures. Vascular mild cognitive impairment (VaMCI) patients had lower scores in Mini-mental State Examination (MMSE) and Montreal Cognitive Assessment (MoCA) and higher ones in Activity of Daily Living (ADL) (p < 0.05). Vascular mild cognitive impairment (VaMCI) individuals had significantly lower ReHo in the left cerebellum and right lentiform nucleus than NCs (P < 0.05, TFCE FWE correction). Vascular mild cognitive impairment (VaMCI) subjects showed significant decreases in the FC of the right EC in the right inferior frontal gyrus, right middle frontal gyrus, bilateral pre-central gyrus, and right post-central/superior parietal lobules (P < 0.05, TFCE FWE correction). Significant positive correlations were found between ReHo and MoCA scores for the right lentiform nucleus (r = 0.37, P < 0.05). The right post-central/superior parietal lobules showed a significant positive correlation between right EC-FC and MoCA scores (r = 0.37, P < 0.05). Patterns in ReHo and EC-FC changes in VaMCI patients and their correlations with neuropsychological measures may be a pathophysiological foundation of cognitive impairment, which may aid the early diagnosis of VaMCI.

【 授权许可】

Unknown