The significance of the features of interhemispheric asymmetry of the spatial synchronization of bioelectric activity of the brain to forecast the risk of brain tissue epileptization

Pestryaev V.A., Lavrova S.A., Zolotukhina A.R.

Abstract.

Coefficients of correlation between different EEG spectra of bipolar assignments having no mutual points were calculated in order to estimate human brain bioelectric activity spatial synchronization state. Two most informative indices of these correlations were selected according to alternation rate of mean values in control and experimental groups of patients with different forms of epilepsy. There indices were used as base for calculation of coordinates for two dimensional vector as the generalized performance of spatial synchronization (SS) of the correspondent hemisphere bioelectric activity. The valid difference between average values of SS parameters for control group and groups with focal form of epilepsy was revealed. Totally different dynamic pattern alternation of this parameter in explored groups is shown to occur after hyperventilation test. These parameters in opposite hemisphere to those with pathological activity nidus may be used for determination of high risk of postoperative brain tissue epileptization.

Keywords:

bioelectric activity, spatial synchronization, spectrum, EEG, epilepsy

Authors
Pestryaev Vladimir A.
Ural State Medical Academy, Department of physiology
620109 Russia, Ekaterinburg, Repina str., 3
е-mail: pestryaev@k66.ru

Lavrova Svetlana A., 
Sverdlovsk Regional Oncology Center
Russia, Ekaterinburg, Sobolev str., 29
е-mail: lavrovas1@yandex.ru

Zolotukhina Alexandera R.
Ural state medical Academy, Department of physiology
Russia, Ekaterinburg of street of Repina str., 3
е-mail: lynx230290@gmail.com