Dynamic EEG Analysis via the Variability of Band Relative Intensity Ratio: A Time-Frequency Method

The effectiveness of band relative intensity ratio (BRIR) based on Time-Frequency Representations (TFRS) was explored as a method to depict brain dynamics in this paper. Electroencephalographic (EEG) signals from 20 subjects through 16 channels have been studied under open eyes state and closed eyes state. The results indicate that EEG rhythm features and the dynamic process of brain activity can be revealed explicitly though the time-frequency variability and the time-frequency- space variability of BRIR. The alpha rhythm is best seen under eyes closed state and blocked when eyes are open generally, but it is strengthened in some times when it is blocked overall under open eyes state.