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- W4200440888 abstract "Abstract Mild cognitive impairment (MCI), as the early important stage of Alzheimer’s disease (AD), is clinically characterized by memory loss and cognitive impairment closely associated with the hippocampus. Accumulating studies have confirmed the presence of neural signal changes within white matter (WM) in resting-state fMRI. However, how the abnormal hippocampus affects the WM regions remained unclear in MCI. The current study employed 43 MCI, 71 very MCI (VMCI) and 87 matched healthy controls (HC) participants from the public OASIS 3 dataset. Adopting left and right hippocampus (HIP.R) as seed points respectively, whole-brain functional connectivity (FC) maps were obtained for each subject. Subsequently, one-way ANOVA was performed to explore the abnormal FC regions with hippocampus within gray matter (GM)/WM. Further probabilistic tracking was performed to explore whether the abnormal FC corresponded to structural connectivity. Compared to HC, MCI and VMCI groups exhibited common reduced static FC (SFC) in the middle temporal gyrus within GM, and temporal pole and inferior frontal gyrus within WM. Specific dysconnectivity was shown in the cerebellum_crus2 and inferior temporal gyrus within GM, and frontal gyrus within WM. In addition, the fiber bundle connecting the HIP.R and temporal pole within WM showed abnormally increased mean diffusion in MCI. The current study extended a new functional imaging direction for exploring the mechanism of memory decline, and promoted the understanding for pathophysiological mechanism in different early stages of AD." @default.
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- W4200440888 date "2021-12-10" @default.
- W4200440888 modified "2023-10-16" @default.
- W4200440888 title "Hippocampus-Based Static Functional Connectivity Mapping within White Matter in Mild Cognitive Impairment" @default.
- W4200440888 doi "https://doi.org/10.21203/rs.3.rs-1106179/v1" @default.
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