Peculiarities of EEG spectral power and coherence in psychic distress
The aim of the work was to study peculiarities of EEG spectral power and coherence in psychic distress. 260 subjects with ages ranging from 20 to 50 years, voluntarily participated in the study. Participants were asked to subjectively report their psychic stress level using the 90-item Symptoms Checklist (SCL-90-R). The electroencephalograph (EEG) signals of all the participants were recorded. After artefact reduction spectral analysis and coherent analysis were performed for all of the EEG channels (19) and six bands. Pearson's correlation was used to determine the strength of relationships among EEG, and SCL-90-R data. Research have shown that high levels of psychic distress correlate with the generalized enhancement of the high beta power (23 to 36Hz, considered a "busy brain" indicator) and the boost of global cortical connectivity in all the bands (with maximum in the delta, theta, beta2 and beta3 bands).