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

[GSM電磁界で変調されたヒト聴覚皮質活性の局在化] med./bio.

Scalp localization of human auditory cortical activity modified by GSM electromagnetic fields.

掲載誌: Int J Radiat Biol 2006; 82 (7): 465-472

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研究目的(著者による)

To determine whether there is a localized effect of GSM microwaves by studying the auditory evoked potentials recorded at the scalp of nine healthy subjects and six epileptic patients.

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 a part of the session lasting about 500 s
  • 電力: 0.25 W mean (simulator-controlled)
  • SAR: 1.4 W/kg average over mass (10 g)

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 a part of the session lasting about 500 s
Additional information Wiart J, Chaillou S, Altman Z, Drago S. 1999. Calculation of the power deposited in tissues close to a handset antenna using a non-uniform FDTD. In: Bersani F, editor. Electricity and magnetism in biology and medicine: 2nd World Congress for electricity and magnetism in biology & medicine, Bologna, Italy, 8 - 13 June 1997. New York: Plenum Press.
Modulation
Modulation type pulsed
Duty cycle 12.5 %
Repetition frequency 216.7 Hz
ばく露装置
ばく露の発生源/構造
  • セルラ-電話
  • helicoidal antenna
チャンバの詳細 The fully conscious subject was comfortably seated in a soundproofed Faraday screen room.
ばく露装置の詳細 The phone was placed close to the right ear on the electrodes helmet using a plastic structure without metal parts.
Sham exposure A sham exposure was conducted.
Additional information Each subject attended single-blind experimental and control sessions that took place over a period of several days. The experimental session consisted of two sequential recording phases, the first one without and the second one with maximum RF emission. The control session was also composed of the same two phases, but both of them without RF emission.
パラメータ
測定量 種別 Method Mass 備考
電力 0.25 W mean 備考を参照のこと。 - simulator-controlled
SAR 1.4 W/kg average over mass 測定値および計算値 10 g -

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:
  • ばく露前
  • ばく露中

研究の主なアウトカム(著者による)

The epileptic patients showed a lengthening of the scalp component N100 (100 ms latency) in the frontal area contralateral to the irradiation. For the healthy subjects, an amplitude increase of the P200 wave (200 ms latency) was identified in the frontal area.
The data indicate that radiofrequency fields emitted by mobile phones modify the auditory evoked potentials. Nevertheless, no direct link between these data and radiofrequency-induced damages in brain function was established.

研究の種別:

研究助成

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