研究のタイプ: サーベイ (医学/生物学の研究)

[ヒトの睡眠に対するパルス無線周波電磁界に対する終夜ばく露の影響] review

The Influence of All-Night Exposure to Pulsed Radiofrequency Electromagnetic Fields on Human Sleep

掲載誌: Somnologie (Somnology) 2005; 9 (4): 176-179

The detailed summary of this article is not available in your language or incomplete. Would you like to see a complete translation of the summary? Then please contact us →

研究目的(著者による)

This article presents a survey of three consecutive studies (see publication 599, publication 646, and publication 5336) investigating the effects of electromagnetic fields emitted by mobile phones on sleep parameters.

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
first study
ばく露2: 900 MHz
Modulation type: pulsed
ばく露時間: continuous for 8 h
second study
ばく露3: 900 MHz
Modulation type: pulsed
ばく露時間: repeated daily exposure, 8 h/night for 2 nights
third study

ばく露1

主たる特性
周波数 900 MHz
タイプ
  • electromagnetic field
偏波
  • linear
ばく露時間 continuous for 8 h
Additional information first study
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
  • stick antenna
Distance between exposed object and exposure source 40 cm
ばく露装置の詳細 The mobile phone was located 40 cm from the head (vertex) of the subjects lying in bed.
Sham exposure A sham exposure was conducted.
Additional information Following an adaptation night, two polysomnographies were performed with or without EMF for half of the subjects in double-blind order.
パラメータ
測定量 種別 Method Mass 備考
電力 8 W peak - - -
電力密度 0.5 W/m² unspecified 推定値 - -

ばく露2

主たる特性
周波数 900 MHz
タイプ
  • electromagnetic field
偏波
  • circular
ばく露時間 continuous for 8 h
Additional information second study
Modulation
Modulation type pulsed
Repetition frequency 217 Hz
ばく露装置
ばく露の発生源/構造
  • セルラ-電話
  • circular polarized logarithmic flat antenna of 20 cm radius
チャンバの詳細 Sleeping chamber constructed of absorbing material
Sham exposure A sham exposure was conducted.
Additional information double-blind study
パラメータ
測定量 種別 Method Mass 備考
電力密度 0.2 W/m² unspecified 測定値 - -

ばく露3

主たる特性
周波数 900 MHz
タイプ
  • electromagnetic field
偏波
  • circular
ばく露時間 repeated daily exposure, 8 h/night for 2 nights
Additional information third study
Modulation
Modulation type pulsed
Repetition frequency 217 Hz
ばく露装置
ばく露の発生源/構造
チャンバの詳細 Sleeping chamber constructed of absorbing material
Sham exposure A sham exposure was conducted.
Additional information Subjects spent 2 sessions, at least 7 days apart, of 3 consecutive nights in the sleep laboratory: one session consisted of an adaptation night and 2 consecutive nights for the recording of the polysomnographies. Half of the subjects were exposed to EMF in the first or the second session (blinded).
パラメータ
測定量 種別 Method Mass 備考
電力密度 50 W/m² unspecified 指定なし - -

Reference articles

  • Wagner P et al. (2000): [パルス化無線周波電磁界の影響下でのヒトの睡眠EEG:最大値より低い電力密度を用いた場合の睡眠ポリグラフの結果]
  • Wagner P et al. (1998): [パルス化無線周波電磁界の影響下でのヒトの睡眠:標準化環境での睡眠ポリグラフ研究]
  • Mann K et al. (1996): [ヒトの睡眠にパルス化高周波電磁界の影響]

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)

A pronounced hypnotic and REM sleep-suppressive effect of the field was the main finding of the first study (publication 599), but it could not be replicated by the following ones, even though the power flux density applied in the third study (publication 5336) exceeded by far that of the pilot study.
Potential explanations are differences in physical qualities of the fields applied in the different investigations (like the type of polarization), interindividual differences in sensitivity to electromagnetic fields among the subjects under study, and the existence of 'window effects', where interactions with sleep architecture only occur in special ranges of power flux densities.

研究の種別:

ばく露

研究助成

関連論文