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

[電磁界感受性報告者群および対照群において携帯電話基地局信号への短期ばく露は認知機能あるいは生理学的指標に影響しない] med./bio.

Short-term exposure to mobile phone base station signals does not affect cognitive functioning or physiological measures in individuals who report sensitivity to electromagnetic fields and controls.

掲載誌: Bioelectromagnetics 2009; 30 (7): 556-563

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研究目的(著者による)

To investigate whether short-term exposure to GSM and UMTS base station signals affects attention, memory and physiological components in 44 electrosensitive and 44 control participants.

詳細情報

The participants performed four testing sessions (at least one week apart from each other): a) baseline measurement before exposure, b) exposure to GSM, c) exposure to UMTS and d) sham exposure.
Cognitive functioning was measured using a digit symbol substitution test (given a table displaying the correspondence between pairs of digits [from 1 to 9] and symbols, subjects have to fill in blank squares with the symbol that is paired with the digit displayed above the square; subjects have to fill in as many squares as possible in 90 sec), a digit span test and mental arithmetic tasks (5 sec to complete addition and subtraction equations; 187 trials).

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 900–1,800 MHz
ばく露時間: continuous for 50 min
ばく露2: 2,020 MHz
ばく露時間: continuous for 50 min

ばく露1

主たる特性
周波数 900–1,800 MHz
タイプ
  • electromagnetic field
ばく露時間 continuous for 50 min
ばく露装置
ばく露の発生源/構造
  • GSM base station
Sham exposure A sham exposure was conducted.
パラメータ
測定量 種別 Method Mass 備考
電力密度 10 mW/m² - 校正 - -

ばく露2

主たる特性
周波数 2,020 MHz
タイプ
  • electromagnetic field
ばく露時間 continuous for 50 min
ばく露装置
ばく露の発生源/構造
Sham exposure A sham exposure was conducted.
パラメータ
測定量 種別 Method Mass 備考
電力密度 10 mW/m² - 校正 - -

Reference articles

  • Eltiti S et al. (2007): [携帯電話基地局シグナルへの短期ばく露によって、電磁過敏症者の症状は増すか?二重ブラインド無作為化誘発研究]

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
  • ばく露後

研究の主なアウトカム(著者による)

Both groups did not differ significantly in their cognitive performance on the baseline measurements. Cognitive functioning was not affected by short-term exposure to either GSM or UMTS signals in control participants and electrosensitive participants.
Electrosensitive participants had a significantly higher level of skin conductance than control participants while performing the cognitive tasks (independent of exposure condition). Blood volume pulse and heart rate did not differ between the two groups nor were they affected by the type of exposure. .

研究の種別:

研究助成

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