Characteristic of Brain Electrobiological Activity in Elderly Women With Different Level of Cognitive Disorders

Abstract

The paper shows the study results of a brain electrobiological activity in elderly women with various level of cognitive impairment. Importance of early diagnostic of cognitive disorders and applicability of methods of functional brain imaging in revealing disorders in higher cortical functions are shown in the paper. To assess cognitive functions we applied express-method of evaluating of cognitive functions during normal aging. According to the test results three groups were formed: 1 - women without cognitive disorders, 2 -with mild cognitive impairment, and 3 - with moderate cognitive impairment. The EEG was registered for all participants by means of 128-channel system GES-300. Absolute spectral power for all bands was calculated. According to the spectral analysis it has been revealed that higher power of the slow-wave rhythms is characteristic of groups with disorders of cognitive functions. Prevalence of a delta rhythm in the general EEG has been also stated. These changes are perhaps caused by dysfunction of the activating cholinergic systems and cortical structures, and also both dyscirculatory and structural changes of brain matter.