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

[空間メモリタスク遂行能力に対する884MHz GSM無線通信信号の影響:実験的誘発研究] med./bio.

The Effects of 884 MHz GSM Wireless Communication Signals on Spatial Memory Performance: An Experimental Provocation Study.

掲載誌: PIERS Proceedings, Prague, Czech Republic The Electromagnetics Academy, 2007: 526-529, ISBN 9781934142028

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研究目的(著者による)

to investigate whether exposure to GSM wireless communication signals has any direct impact on the spatial memory performance.

詳細情報

The male and female probands (n=55) aged 18 to 45 were daily mobile phone users and with or without symptoms they associated with mobile phone use. The test persons were either exposed or sham exposed. The probands passed seven trials in a virtual spatial navigation task (modeled after the Morris Water Task) in which the participant has to navigate to a platform in a pool.

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 884 MHz
Modulation type: pulsed
ばく露時間: continuous for 3 h
temporal change between non-DTX and DTX mode
  • SAR: 0.23 W/kg spatial average (10 g) (average interval duration of 5 s (DTX mode))
  • SAR: 1.95 W/kg peak (10 g) (average interval duration of 11 s)
  • SAR: 1.4 W/kg spatial average (10 g) (time averaged result of the above values)

General information

55 mobile phone users divided into two groups: i) participants with symptoms (headache, dizziness, difficulties in concentrating) ii) participants with none of the above symptoms

ばく露1

主たる特性
周波数 884 MHz
タイプ
  • electromagnetic field
ばく露時間 continuous for 3 h
Additional information temporal change between non-DTX and DTX mode
Modulation
Modulation type pulsed
Additional information

exposure simulated the modulation of the GSM frame structures, but not the higher frequencies resulting from random code modulation

ばく露装置
ばく露の発生源/構造
  • patch antenna
ばく露装置の詳細 antenna exposed simultaneously all possible exposure foot points of mobile phones and the deeper brain structures
Sham exposure A sham exposure was conducted.
パラメータ
測定量 種別 Method Mass 備考
SAR 0.23 W/kg spatial average - 10 g average interval duration of 5 s (DTX mode)
SAR 1.95 W/kg peak - 10 g average interval duration of 11 s
SAR 1.4 W/kg spatial average - 10 g time averaged result of the above values

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
  • ばく露後

研究の主なアウトカム(著者による)

The group with symptoms improved their performance under exposure to GSM signals, while no such an effect was observed for the group without symptoms. Exposure to GSM signal had no significant effect in both groups on learning in the trials 1 to 7.

研究の種別:

研究助成

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