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This study was focused on detection of the effect of microwave irradiation modulated with pulses of different frequencies on human EEG rhythm.
Seventy healthy vonlunteers were sham exposed and electromagnetic field exposed in four groups with following pulse frequencies: 7, 14, 21, 40, 70, 217, and 1000 Hz.
The experiments were performed on four groups of subjects with different pulse rates. After recording the reference EEG for 10 minutes, exposure at the first pulse rate was applied, followed by one or two further pulse rates according to the considered group. During each test session, RF and sham exposure as well as the succession of pulse rates were randomly assigned.
|ばく露時間||intermittent, 1 min on/1 min off, for 10 x at each pulse rate|
|Distance between exposed object and exposure source||10 cm|
|ばく露装置の詳細||The antenna was located 10 cm from the left side of the head.|
|Sham exposure||A sham exposure was conducted.|
Statistically significant changes occured in the EEG rhythm energy and dynamics between 12% and 30% of subjects. Theta wave was least affected. Most changes were observed in beta waves. Concerning brain region major changes were revealed in temporal-parietal brain region. Statistically significant changes in the EEG rhythms took place at the pulse frequencies higher or close to the EEG rhythm frequency.