Dynamic Analysis in Resting-State EEG Based on Natural Stimuli via Power Spectra and Microstate

Studying the changes of resting-state EEG in response to different natural stimuli is of great interest for understanding the dynamic functional brain activity in the natural environment. In this study, 14 male participants were recruited to study resting-state EEG changes after natural stimulation using different natural stimulation paradigms, including a cinema and three kinds of games. Based on frequency domain and spatiotemporal dynamics perspectives, we performed EEG power spectra and microstate analyses. The results showed significant changes in whole-brain mean relative power delta, theta, alphal, and beta2, and a substantial increase in the duration of EEG microstate B after game stimuli. The results suggested that delta, theta, alphal, beta2, and the duration of microstate B may play an important role in the brain's dynamic self-regulation process under complex external stimuli. This study provides new insights into the dynamic regulation of the brain under different natural stimulus conditions.