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

[ヒトの睡眠にパルス化高周波電磁界の影響] med./bio.

Effects of pulsed high-frequency electromagnetic fields on human sleep.

掲載誌: Neuropsychobiology 1996; 33 (1): 41-47

この研究は、デジタル移動無線電話のパルス高周波電磁界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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研究目的(著者による)

To investigate the influence of pulsed high-frequency electromagnetic fields of digital mobile phones on sleep in healthy humans.

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

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 580 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 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).
パラメータ
測定量 種別 Method Mass 備考
電力 8 W peak - - -
電力密度 0.05 mW/cm² mean - - at 40 cm

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)

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.

研究の種別:

研究助成

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