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

[携帯電話からのラジオ周波数放射のヒトの認知機能への影響] med./bio.

Effects of radiofrequency radiation emitted by cellular telephones on the cognitive functions of humans.

掲載誌: Bioelectromagnetics 2006; 27 (2): 119-126

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研究目的(著者による)

To study the effects of exposure to electromagnetic irradiation emitted by a standard GSM phone at 890 MHz on human cognitive functions.

詳細情報

This study attempted to establish a connection between the exposure of a specific area of the brain and the cognitive functions associated with that area. Cognitive tasks were chosen according to the brain side they are assumed to activate.

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 890.2 MHz
Modulation type: pulsed
ばく露時間: continuous for 2 hours

ばく露1

主たる特性
周波数 890.2 MHz
タイプ
  • electromagnetic field
ばく露時間 continuous for 2 hours
Modulation
Modulation type pulsed
Pulse width 577 ms
Duty cycle 12.5 %
ばく露装置
ばく露の発生源/構造
  • セルラ-電話
  • see setup details
ばく露装置の詳細 Each subject had two standard Nokia 5110 GSM cellular phones attached to both sides of his head by a non-conductive frame. The cellular phones power was controlled by using an HP GSM test system model E6392B. The phones were operated with test SIM cards. This system maintained the phones at either no transmission or full power transmission. The communication between the phones and the test system was wireless, at an extremely small output power (0.01 mW peak), which is considered negligible. During the experiment, the phones were battery operated.
Additional information The test was divided into two sessions: a first 1 h series of tasks, a 5 min break, and then another hour of tasks. All subjects performed all four tasks under either, left, right, or sham exposure conditions. This resulted in 12 sub-sessions per subject. Each subject performed a total of 1614 trials in all four experiments.
パラメータ
測定量 種別 Method Mass 備考
電力 2 W peak - - -
電力 0.25 W average over time - - -

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 indicated that the exposure of the left side of the brain slows down the left-hand reaction time. This effect was apparent in three of the four tasks, but it was highly significant in only one of the tests (in the spatial item recognition task). This effect became evident only in the second part of the experiment (after an hour of test, of which 40 min were under full exposure). The exposure intensity and its duration exceeded the common exposure of mobile phone users.

研究の種別:

研究助成

Replication studies

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