この研究は、デジタル移動無線電話のパルス化高周波電磁界が健康なヒトの睡眠に及ぼす影響を調べた。その結果、 睡眠開始潜時の短縮などの催眠効果の他に、REM睡眠の持続時間および割合の低下などのREM抑制効果が見られた;さらに、スペクトル分析により、REM睡眠中には、スペクトルパワー密度上昇など脳電図信号の定性的変化が明らかに見られた、と報告している。
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To investigate the influence of pulsed high-frequency electromagnetic fields of digital mobile phones on sleep in healthy humans.
周波数 | 900 MHz |
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タイプ |
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ばく露時間 | continuous for 8 h |
Modulation type | pulsed |
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Pulse width | 580 µs |
Repetition frequency | 217 Hz |
ばく露の発生源/構造 |
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Distance between exposed object and exposure source | 40 cm |
ばく露装置の詳細 | The mobile phone was positioned at the head of the bed at a distance of 40 cm to the vertex of the subject and was operated from the neighbouring room via an extension lead. |
Additional information | After an adaptation night, polysomnographies were performed during two successive nights. Half of the subjects were exposed to the EMF on the first night and the other half on the second night (randomized and blinded). |
Besides a hypnotic effect with shortening of sleep onset latency, a REM (rapid eye movement) suppressive effect with reduction of duration and percentage of REM sleep was found. Spectral analysis revealed qualitative alterations of the EEG signal during REM sleep with an increased spectral power density. Knowing the relevance of REM sleep for adequate information processing in the brain, especially concerning mnestic functions and learning processes, the findings emphasize the necessity to carry out further investigations on the interaction of this type of electromagnetic fields and the human organism.
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