Altered regional homogeneity in Parkinson’s disease with mild cognitive impairment: a resting-state fMRI study

Background To explore changes in regional homogeneity (ReHo) of brain function in patients with Parkinson’s disease with mild cognitive impairment (PD-MCI) using resting-state functional magnetic resonance imaging (rs-fMRI), and to analyze the correlation between ReHo values in differential brain regions and cognitive function, so as to identify potential neuroimaging biomarkers for PD-MCI. Methods A total of 43 patients with PD were enrolled and divided into the PD-MCI group ( n = 23) and the P