The use of EEG with cognitive load in the diagnosis of discirculatory encephalopathy at the stage of mild cognitive impairment

Purpose: conducting EEG (electroencephalography) with a cognitive load to identify specific markers of mild cognitive impairment (MCI) in cerebrovascular pathology. Material and Methods. Object of study: 63 people with a diagnosis of discirculatory encephalopathy (DE), including 36 people with stage II DE and concomitant MCI (group A), 27 people with stage I DE, cognitively healthy (group B). Results. When presenting of a cognitive load in patients of group A, an increase in the spectral power of slow-wave activity in the 6- and 9-range was noted mainly in the frontal, central, temporal, parietal leads with an emphasis on the left (when performing the "Plants" and "Count" tests). The "What is in common" test revealed a statistically significant increase in a-rhythm. The "Word" test demonstrated significant differences in the a-range in the parieto-occipital leads and a statistically significant increase in the 6-rhythm of the frontal leads of the left hemisphere. Conclusion. A cognitive-loaded EEG is a sensitive method for detecting specific markers. The results can serve as criteria for the early diagnosis of discirculatory encephalopathy at the stage of MCI.