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

[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] med./bio.

Human sleep under the influence of pulsed radiofrequency electromagnetic fields: a polysomnographic study using standardized conditions.

掲載誌: Bioelectromagnetics 1998; 19 (3): 199-202

この研究は、24人の健康な男性被験者を対象に、携帯電話GSM信号の高周波電磁界EMF)がヒト睡眠脳波(EEG)パターンに及ぼす影響を調べた。円偏波EMF(217Hzパルス変調900 MHzパルス幅 577µs、電力密度 0.2 W / m2)のばく露下および非ばく露下での終夜睡眠脳電図を記録した。その結果、ばく露下での急速眼球運動(REM)睡眠抑制ならびに睡眠誘発効果は統計的有意に達しなかった;したがって、これらの睡眠パラメータの変化を示した先行研究は再現できなかった;スペクトルパワー解析結果も、EMFばく露下でのEEGリズムの変化を明確に示さなかった、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 radiofrequency electromagnetic fields of cellular phone GSM signals on human sleep EEG pattern.

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
  • 電力密度: 0.2 W/m² mean
  • SAR: 0.3 W/kg (at the vertex)
  • SAR: 0.6 W/kg maximum (at the back of the neck)

ばく露1

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
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
  • logarithmic periodic flat antenna with 20 cm radius
Distance between exposed object and exposure source 40 cm
チャンバの詳細 The exposure chamber (2 x 1.5 x 3 m³) was metal-free and lined with RF absorbing material and contained a bed made of wood.
ばく露装置の詳細 The antenna was positioned 40 cm below the pillow of the bed. Due to its special construction, the EMF was nearly homogeneous at the subject's head.
Additional information After an adaptation night, polysomnographies were performed during two successive nights. One-half of the subjects were exposed (double-blind) on the first night and one-half on the second night.
パラメータ
測定量 種別 Method Mass 備考
電力密度 0.2 W/m² mean 測定値 - -
SAR 0.3 W/kg - 計算値 - at the vertex
SAR 0.6 W/kg maximum 計算値 - at the back of the neck

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)

Suppression of REM sleep (rapid eye movement) as well as a sleep-inducing effect under field exposure did not reach statistical significance. Previous results (publication 599) indicating alterations of these sleep parameters could not be replicated. Spectral power analysis also did not show any alterations of the EEG rhythms during electromagnetic field exposure. The failure to confirm the previous results might be due to dose-dependent effects of the electromagnetic field on the human sleep profile.

研究の種別:

研究助成

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