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

[902 MHz携帯電話による電磁界は小児の認知機能に影響しない] med./bio.

Electromagnetic field emitted by 902 MHz mobile phones shows no effects on children's cognitive function.

掲載誌: Bioelectromagnetics 2005; 26 Suppl 7: S144-S150

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研究目的(著者による)

To study the potential effects of a standard 902 MHz global system for mobile communications (GSM) mobile phone on 10-14 years old children's cognitive function.

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 902 MHz
Modulation type: pulsed
ばく露時間: continuous for approx. 50 min
  • SAR: 2.07 W/kg maximum
  • SAR: 1.44 W/kg average over mass (1 g)
  • SAR: 0.99 W/kg average over mass (10 g)

General information

The subjects, 32 children 10-14 years old, performed a series of cognitive tests while being exposed or sham-exposed.

ばく露1

主たる特性
周波数 902 MHz
タイプ
  • electromagnetic field
ばく露時間 continuous for approx. 50 min
Modulation
Modulation type pulsed
Pulse width 577 µs
Repetition frequency 217 Hz
Additional information

DTX mode was not activated.

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 A GSM telephone placed in a leather and vinyl case was mounted with an adjustable rubber EEG head cap on the left side of the subject's head in the normal position of use. The antenna was located over the left posterior temporal lobe. The RF power was switched on and off via a data cable from a laptop.
Additional information EMF exposure and sham exposure sessions in double-blind design were separated by 24 ± 1 h.
パラメータ
測定量 種別 Method Mass 備考
SAR 2.07 W/kg maximum 測定値 - -
SAR 1.44 W/kg average over mass 測定値 1 g -
SAR 0.99 W/kg average over mass 測定値 10 g -

Reference articles

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)

The data showed no significant differences between the mobile phone off and on conditions in reaction times and accuracy.
The authors concluded that a standard mobile phone has no effect on children's cognitive function. The present findings challenge some earlier results (e.g. publication 3601 and publication 4728) suggesting that the electromagnetic field created by an active mobile phone would facilitate cognitive functioning.

研究の種別:

研究助成

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