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

[携帯電話ばく露はヒトの随伴陰性変動を変化させる] med./bio.

Mobile phones exposure induces changes of contingent negative variation in humans.

掲載誌: Neurosci Lett 2009; 464 (2): 79-83

この論文は、健常なボランティア被験者(21-30歳の男性5人、女性5人)に、3回の実験(すなわち携帯電話ONでのGSM信号出力ばく露(A条件)、携帯電話ONだが出力は内部で吸収させた状態での擬似ばく露(B条件)、携帯電話OFFでの実験(C条件))を二重ブラインド法で行い、それぞれの実験条件下で10分間の随伴陰性変動(CNV)を記録した。その結果、C条件に比べA、B条件において、初期CNVの振幅低下と慣れ現象の増加が見られたことを報告している。

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研究目的(著者による)

To study the initial contingent negative variation changes induced by 900 MHz GSM exposure in ten healthy volunteers. under three experimental conditions (randomized across the subjects and with ten minutes time interval in-between): 1) exposure to a GSM mobile phone, 2) sham exposure and 3) the phone was completely switched-off (further details see "exposure").

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 900 MHz
ばく露時間: 48 trials with intervals of 4 s to 6 s
  • 電力: 2 W maximum
  • SAR: 0.5 W/kg maximum (+/- 0.1 W/kg phone A)

General information

subjects were tested under three conditions: i) GSM phone emitting power ii) power from the GSM phone dissipated on an internal load iii) phone switched off

ばく露1

主たる特性
周波数 900 MHz
タイプ
  • electromagnetic field
ばく露時間 48 trials with intervals of 4 s to 6 s
ばく露装置
ばく露の発生源/構造
  • セルラ-電話
ばく露装置の詳細 two commercially identical phones A and B mounted on a plastic helmet; phone B modified by connecting the output of the GSM power signal to an internal load instead of the antenna; subjects sitting in a schielded room
Sham exposure A sham exposure was conducted.
パラメータ
測定量 種別 Method Mass 備考
電力 2 W maximum - - -
SAR 0.5 W/kg maximum - - +/- 0.1 W/kg phone A

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:
調査の時期:
  • ばく露中

研究の主なアウトカム(著者による)

The initial contingent negative variation amplitude decreased and habituation increased during both exposure conditions (1 and 2) compared with condition 3, where the mobile phone was switched off. This effect was diffuse over the scalp, and there was no significant prevalence of amplitude decrease on the left side, where the cell phone was located. This evidence, limited by the low number of subjects investigated, could be explained in terms of an effect induced by both the GSM signal and the extremely low frequency magnetic field produced by battery and internal circuits.

研究の種別:

研究助成

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