Hippocampus-Based Dynamic Functional Connectivity Mapping in the Early Stages of Alzheimer's Disease
Document Type
Article
Publication Date
1-1-2022
Abstract
Background: The hippocampus with varying degrees of atrophy was a crucial neuroimaging feature resulting in the declining memory and cognitive function in Alzheimer's disease (AD). However, the abnormal dynamic functional connectivity (DFC) in both white matter (WM) and gray matter (GM) from the left and right hippocampus remains unclear. Objective: To explore the abnormal DFC within WM and GM from the left and right hippocampus across the different stages of AD. Methods: Current study employed the OASIS-3 dataset including 43 mild cognitive impairment (MCI), 71 pre-mild cognitive impairment (pre-MCI), and matched 87 normal cognitive (NC). Adopting the FMRIB's Integrated Registration and Segmentation Tool, we obtained the left and right hippocampus mask. Based on above hippocampus mask as seed point, we calculated the DFC between left/right hippocampus and all voxel time series within whole brain. One-way ANOVA analysis was performed to estimate the abnormal DFC among MCI, pre-MCI, and NC groups. Results: We found that MCI and pre-MCI groups showed the common abnormalities of DFC in the Temporal_Mid_L, Cingulum_Mid_L, and Thalamus_L. Specific abnormalities were found in the Cerebelum_9_L and Precuneus of MCI group and Vermis_8 and Caudate_L of pre-MCI group. In addition, we found that DFC within WM regions also showed the common low DFC for the Cerebellum anterior lobe-WM, Corpus callosum, and Frontal lobe-WM in MCI and pre-MCI group. Conclusion: Our findings provided a novel information for discover the pathophysiological mechanisms of AD and indicate WM lesions were also an important cause of cognitive decline in AD.
Identifier
85125000130 (Scopus)
Publication Title
Journal of Alzheimer S Disease
External Full Text Location
https://doi.org/10.3233/JAD-215239
e-ISSN
18758908
ISSN
13872877
PubMed ID
34958033
First Page
1795
Last Page
1806
Issue
4
Volume
85
Grant
61871420
Fund Ref
National Natural Science Foundation of China
Recommended Citation
Wang, Jianlin; Wang, Pan; Jiang, Yuan; Wang, Zedong; Zhang, Hong; Li, Hongyi; and Biswal, Bharat B., "Hippocampus-Based Dynamic Functional Connectivity Mapping in the Early Stages of Alzheimer's Disease" (2022). Faculty Publications. 3470.
https://digitalcommons.njit.edu/fac_pubs/3470
