Tribrat O. Changes of neuro- and psychophysiological parameters during EEG-biofeedback tests

Changes of power of components of the event related EEG-potentials (ERP) and specters of the EEG was studied in set the experiments with biofeedback, which consists of three tries and based on EEG characteristics, which were oriented on increasing ration between power of alpha- and theta rhythms analyzes was done. EEG-potentials were recorded in C3 and C4 locus. ERP were registered using time interval measuring paradigm. It was noted that in EEG-feedback test ratio between power of the alpha- and theta rhythm was decreasing in control group as well as in experimental one. While in experimental group this ratio was not decreasing much and in the third set of experiments was significantly higher than in control group. Amplitude of an early component of the potential of readiness in both hemispheres and relative negative wave in the right hemisphere was significantly higher after set of EEG-feedback. It can be concluded that the minimal efficient set of alpha-theta-training, which leads to changes in EEG-pattern for the majority of healthy volunteers, consists of three tries.