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

[小児の認知機能に対する902 MHz携帯電話伝送の影響] med./bio.

Effect of 902 MHz mobile phone transmission on cognitive function in children.

掲載誌: Bioelectromagnetics 2005; 26 Suppl 7: S138-S143

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研究目的(著者による)

To study whether a standard mobile phone exposure at 902 MHz has a significant effect on cognitive function in 18 children 10-12 years of age.

詳細情報

The children were in a single group in which each child was given a single training session and then three test sessions using the cognitive drug research cognitive assessment system.

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 30 min

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 30 min
Additional information Reference article: CENELEC. 2000. Basic standard for the measurement of specific absorption rate related to human exposure to electromagnetic fields from mobile phones (300 MHz to 3 GHz). Draft proposal l. European Committee for Electro-Technical Standardization.
Modulation
Modulation type pulsed
ばく露装置
ばく露の発生源/構造
  • セルラ-電話
チャンバの詳細 Children sat in a quiet room with good uniform lighting and only the tester was present.
ばく露装置の詳細 The phone in normal use position was placed in an acrylic cradle mounted on a plastic ear defender, replacing the earmuff on the left side. The phone was handed over after checking against a RF signal strength meter.
Additional information Each child was given three test sessions on sequential days, in a randomized, three-way crossover design. During the power off mode (sham condition), the mobile phone was not on standby but switched off. The phone was modified by removing the audio transducer in order to prevent low level buzzing during high power operation.
パラメータ
測定量 種別 Method Mass 備考
電力 2 W peak 測定値 - -
電力 0.25 W mean 測定値 - -
SAR 0.28 W/kg maximum 測定値および計算値 brain -
電力 0.2 W peak 測定値 - -
電力 0.025 W mean 測定値 - -

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)

This findings showed trends toward faster reaction times, higher accuracy, and higher sensitivity in the presence of irradiation from a GSM mobile phone. However, none of these effects reached statistical significance. Although, the tests employed were very similar to those used in a previous study in adults (see publication 162) the effects seen in that study were not replicated. However, the present study investigated the effects of irradiation from a GSM mobile phone, whereas in the previous study the effect on reaction time was observed only with a more powerful analogue handset.

研究の種別:

研究助成

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