EEG Physiological Signals Correlation under Condition of +Gz Accelerations

摘要

In this research, by simultaneously recording the Electroencephalogram(EEG), Electrocardiogram(ECG) and brain blood pressure signals under the condition of +Gz accelerations, the correlation of EEG and heart rate, brain blood pressure was respectively studied in order to provide experimental basis for correctly understanding the relationships between global and local areas as well as among different local areas of human brain, and also to lay foundation for the EEG spectral analysis, interaction and mechanism research of EEG and related physiological signals. The results of EEG auto-correlation and symmetrical electrode cross-correlation analysis of 16 derivation for different loads were obtained, and the correlation coefficients of EEG and brain blood pressure, heart rate were calculated by designing analytical procedure of processing and analyzing the EEG data through programming. Correlation diagrams indicate that the first peak after zero lags appeared is the main peak responding to relatively stronger correlation and correlation numerical value of the first main peak is the largest and the correlation is greatly impacted by different G loads; EEG and heart rate, brain blood pressure, each frequency band of EEG and heart rate, brain blood pressure has different correlation degree separately. In this study EEG experiments are first carries out on high performance three axial human centrifuge by using a new specific acquisition and test method of EEG and related physiological signals and correlation research of EEG and heart rate, brain blood pressure under +Gz accelerations is first proposed. The conclusion can be drawn that EEG correlation under +Gz accelerations is gradually decreased with time lag increasing, greatly affected by G loads and correlation degree of EEG and brain blood pressure is greater than that of EEG and heart rate.