Effect of Modulated Microwave Exposure on Spectral Asymmetry of Human EEG

摘要

This study was aimed to investigate the effect of modulated low-level microwave radiation on the human electroencephalographic (EEG) signal. The 450 MHz microwave exposure 100% pulse-modulated at 40 Hz frequency was applied to a group of 14 volunteers. The field power density at the scalp was 0.16 mW/cm~2. Ten cycles of the exposure (1 min on and 1 min off) were applied. The resting 9 channels EEG was recorded during 20 minutes in exposed and sham conditions. The EEG spectral asymmetry index was calculated as a relative difference in powers of high and low EEG frequency bands. The analysis revealed statistically significant changes caused by microwave exposure for the whole group in temporal, parietal and occipital EEG channels. The exposure caused increase in the calculated EEG spectral asymmetry index values related to increase in the EEG beta power.