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ObjectiveAnalysis of Alpha Spectral Characteristics in the Parieto-Occipital lobe of Elderly Individuals with Chronic Insomnia and Mild Cognitive Impairment （MCI）.MethodsEighty elderly individuals with chronic insomnia and mild cognitive impairment （MCI） were selected from the community in Fuzhou, Fujian Province, from June 2019 to December 2020. This included a healthy control group （HC） of30 individuals, a chronic insomnia group （CI） of 20 individuals, and a chronic insomnia with MCI group （CI-MCI） of 30 individuals. The Pittsburgh Sleep Quality Index （PSQI） was used to assess sleep quality, while the Fuzhou version of the Montreal Cognitive Assessment （MoCA） was employed to evaluate cognitive functions, including visuospatial execution, naming, attention, verbal fluency, abstraction, delayed recall, and orientation. Daytime resting-state electroencephalography （EEG） was collected using the Neuroscan synchronous EEG recording system, comparing the power values and trends of alpha waves （8–13 Hz） across channels in the occipital lobe. Additionally, we analyzed the changes in alpha spectral power in relation to cognitive functions.Results（1）PSQI scores：Compared to the HC group, the daytime functional impairment scores in the CI-MCI group were significantly higher, with a statistically significant difference （P |
