Keywords: Neurodegeneration, Brain ConnectivityWe performed a meta-analysis to investigate shared and different alterations of resting-state functional connectivity (rsFC) for default mode network (DMN) in mild cognitive impairment (MCI) and Alzheimer’s disease (AD). We found both patients with MCI and AD showed hypoconnectivity within DMN in bilateral medial prefrontal cortex (mPFC)/anterior cingulate cortex (ACC) and precuneus/posterior cingulate gyrus (PCC), indicating possibly shared neuropathologic mechanism underlying common cognitive dysfunction. Moreover, we identified distinct alterations of rsFC for DMN in some brain regions, which suggested potential imaging markers to distinguish the two diseases.
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