この研究は、デジタル移動無線電話からのパルス高周波電磁界のばく露を受けた健康なヒトの睡眠中の心拍数への影響を調べた。平均RR間隔およびRR間隔の全体変動に加え、交感神経系と副交感神経系のバランスについての情報提供するスペクトルパワー分析により、周波数領域での心拍変動性を評価した。これらのパラメータは、異なる睡眠段階の間で有意差が見られることを確認した。特に、徐波睡眠(低周波成分が多い)時は、交感神経よりも副交感神経の優位性が示され、対照的に、レム睡眠中は自律神経のバランスが交感神経活動優位にシフトした。ばく露実験の結果、すべての心拍数パラメータについて、プラセボ条件と比較して、ばく露条件下で有意な影響は検出されなかった、と報告している。
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The effects of pulsed high-frequency electromagnetic fields in the lower microwave frequency range generated by a digital mobile phone on heart rate variability during sleep were investigated.
The relation between low frequency and high frequency components of heart rate variability represents the balance between the two branches of the autonomic nervous system. The high frequency component reflecting sinus arrhythmia, has been attributed to the modulation of the parasympathetic output. The low frequency component has been referred to both sympathetic and parasympathetic activity.
ばく露 | パラメータ |
---|---|
ばく露1:
900 MHz
Modulation type:
pulsed
ばく露時間:
continuous for 8 h
|
|
The experimental design was identical to the previous study detailed in the reference article.
周波数 | 900 MHz |
---|---|
タイプ |
|
ばく露時間 | continuous for 8 h |
Modulation type | pulsed |
---|---|
Pulse width | 577 µs |
Repetition frequency | 217 Hz |
ばく露の発生源/構造 |
|
---|---|
Distance between exposed object and exposure source | 40 cm |
ばく露装置の詳細 | The mobile phone was positioned at a distance of 40 cm to the vertex with the antenna axis perpendicular to the axis of the subject's body. |
Additional information | After an adaptation night, polysomnographies were performed during two successive nights. Each subject was exposed to the EMF in one night and not exposed in the other night (randomized and blinded). |
測定量 | 値 | 種別 | Method | Mass | 備考 |
---|---|---|---|---|---|
電力密度 | 0.05 mW/cm² | mean | - | - | at 40 cm |
Under these experimental conditions, the autonomic control of heart rate was not affected by weak high frequency electromagnetic fields emitted by digital mobile phones.
For most parameters, significant differences between different sleep stages were revealed. In particular, slow wave sleep was characterized by a low ratio of low frequency and high frequency components, indicating a predominance of the parasympathetic over the sympathetic tone. In contrast, during REM sleep the autonomic balance was shifted in favor of the sympathetic activity. For all heart rate parameters, no significant effects were detected under exposure compared to sham exposure.
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