Microwave radiation has modulation frequency dependent stimulating effect on human EEG rhythms

This study is focused on low-level modulated microwave field effects on human EEG theta, alpha and beta rhythms at different modulation frequencies. During the experiment 13 healthy volunteers were exposed to a microwave (450 MHz) with 7 Hz, 14 Hz and 21 Hz frequency on-off modulation. The field power density at the scalp was 0.16 mW/cm². The experimental protocol consisted of five cycles of the repetitive microwave stimulation at fixed modulation frequencies. Changes in the EEG rhythms energy became evident in the case of modulation frequencies higher than the EEG rhythms frequencies. The changes varied strongly from subject to subject. Microwave exposure caused statistically significant changes in the EEG theta rhythm energy and for occipital channels in the alpha rhythm energy.