Fritzsche L. Characteristics of the electrical brain activity in young men during emotional stress assessed by nonlinear dynamics methods

Object of the research - a dynamics of human cerebral systems during background activity and emotional tension. Purpose of the research - to investigate the cerebral neurodynamics during different conditions (states) in young men using novel methods of nonlinear dynamics analysis of the electrical brain activity. Material and methods of research. 61 healthy volunteers, men, aged 18 - 22, with different level of anxiety (within limits of norm) were examined. Methods of research: psychological testing (hospital anxiety and depression scale); methodic of electric current stimulation; functional challenge - mental reverse calculation; electroencephalography; nonlinear analysis; electrocardiography; heart rate variability; methods of mathematical statistics. Theoretical and practical results, novelty. For the first time, the typical limits of the Kolmogorov-Sinay entropy (eKS) and Maximal Lyapunov Exponent (mLE) for symmetrical areas over the brain hemispheres were assessed. Significant decreases of eKS and mLE level were shown in a number of brain areas during 'anticipation stress'. These results indicate a decrease in the number of the active parallel dynamic processes in the brain and apparently account for the organization of behavioral dominant. Area of implementation: clinical neurophysiology, psychophysiology, clinical informatics, physiology of cardiovascular system, occupational selection, teaching of physiology in high schools.