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The hypothesis, evaluated in this study, is that modulated at 217 Hz microwave exposure increases variability of the EEG signal and causes changes in the power spectrum of the EEG in humans.
During the study 19 healthy volunteers were sham-exposed or exposed to microwaves.
Modulation type: pulsed
ばく露時間: intermittent, 60 s on/60 s off, for 20 min
|ばく露時間||intermittent, 60 s on/60 s off, for 20 min|
|Duty cycle||50 %|
|Repetition frequency||217 Hz|
|Distance between exposed object and exposure source||10 cm|
|チャンバの詳細||The subjects lay in a dark room in a relaxed position, eyes closed and ears blocked.|
|ばく露装置の詳細||The antenna was located at 10 cm from the skin on the left side of the head.|
|Sham exposure||A sham exposure was conducted.|
|Additional information||Only one EEG recording was performed for a subject per day. Test sessions were double blind, and the exposed and sham exposed subjects were randomly assigned.|
|電力密度||0.16 mW/cm²||-||推定値||-||at the scalp|
Low-level 450 MHz microwaves modulated at 217 Hz produced statistically significant changes in time variability and intensity of the EEG signal for 10-20 % of the subjects. The effect was stronger on EEG beta waves in temporal and parietal regions of the brain.