Coherence and phase synchronization of the brain electrical activity
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Abstract
The work is devoted to estimation of connectivity of brain electrical activity by coherence and phase synchronization. The features of the application of these synchrony measures are considered, four combinations of electroencephalogram (EEG) leads (from left and right hemispheres, symmetric and asymmetric interhemispheric leads) are proposed for investigation of brain activity characteristics in different hemispheres. In the result of background brain electrical activity of healthy patients, difference between symmetric and asymmetric interhemispheric connectivity was identified. The similarity of hemisphere connectivity, which confirms the symmetry of brain activity, was revealed. The results indicate the possibility of desynchronization of brain activity during background recording and allow to estimate the maximum value of consistency of activity in different frequency bands for different derivation groups.
References 12, Fig. 5, Table. 2
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