研究のタイプ: 医学/生物学の研究 (experimental study)

[高周波パルス電磁界は睡眠時における心拍変動に影響しない] med./bio.

No effects of pulsed high-frequency electromagnetic fields on heart rate variability during human sleep.

掲載誌: Neuropsychobiology 1998; 38 (4): 251-256

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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研究目的(著者による)

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.

詳細情報

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.

影響評価項目

ばく露

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

General information

The experimental design was identical to the previous study detailed in the reference article.

ばく露1

主たる特性
周波数 900 MHz
タイプ
  • electromagnetic field
ばく露時間 continuous for 8 h
Modulation
Modulation type pulsed
Pulse width 577 µs
Repetition frequency 217 Hz
ばく露装置
ばく露の発生源/構造
  • セルラ-電話
  • GSM system
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).
パラメータ
測定量 種別 Method Mass 備考
電力密度 0.05 mW/cm² mean - - at 40 cm

Reference articles

ばく露を受けた生物:

方法 影響評価項目/測定パラメータ/方法

研究対象とした生物試料:
研究対象とした臓器系:
調査の時期:
  • ばく露中

研究の主なアウトカム(著者による)

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.

研究の種別:

研究助成

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