この研究は、36人のボランティアを対象にした、一重ブラインド化、クロスオーバ設計および擬似対照実験で、電磁界がヒトの脳活動に及ぼす影響を調べた。MediLine「MEGA-WAVE 150/1」治療機器から発生する電磁界、および無線通信用移動デジタル電話から発生する電磁界の2つのばく露セッションと、無ばく露の擬似ばく露セッションを全てのボランティアは体験した。その結果、MEGA-WAVE装置電磁界ばく露セッションでは、ばく露中およびその後に、Alpha2、Beta1およびBeta2の周波数バンドのEEGパワーの増加がみられた;携帯電話電磁界ばく露セッションでは、ばく露終了から15分後に、同じ周波数バンドでの増加が見られた、と報告している。
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To study possible effects of electromagnetic fields on human brain activity.
In this single-blind, cross-over designed study, subjects were exposed to three different exposure conditions with at least one day between sessions: digital mobile telephone (T), "MEGA-WAVE" therapy instrument (M) (positive control), and no field exposure = placebo (P). Each volunteer had to go through one of the following sequences: P/M/T, T/P/M, M/T/P, P/T/M, M/P/T or T/M/P. All permutations occurred randomized and with the same frequency.
周波数 | 902.4 MHz |
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タイプ |
|
ばく露時間 | continuous for 15 min |
Modulation type | pulsed |
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Repetition frequency | 217 Hz |
Additional information |
D-network |
ばく露の発生源/構造 |
|
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Distance between exposed object and exposure source | 40 cm |
チャンバの詳細 | Subjects were seated in a comfortable armchair in a well ventilated room. |
ばく露装置の詳細 | The mobile phone was placed 40 cm behind the subject's head with the antenna being centred. |
Additional information | Each single session lasted one hour and six min with breaks of 2 min every 15 min and exposure (if any) only in the second quarter. The instruments remained in position and were switched on or off during breaks. |
測定量 | 値 | 種別 | Method | Mass | 備考 |
---|---|---|---|---|---|
電力 | 8 W | - | - | - | - |
周波数 | 150 kHz |
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タイプ |
|
波形 |
|
ばく露時間 | continuous for 15 min |
Modulation type | pulsed |
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Pulse width | 80 µs |
Repetition frequency | 9.6 Hz |
Additional information |
off-pulses |
ばく露の発生源/構造 |
|
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Distance between exposed object and exposure source | 3 cm |
ばく露装置の詳細 | The magnetic applicator (coil) of the MEGA-WAVE was positioned just below the occipital electrodes O1 and O2 in the centre, 3 to 5 cm from the skin. |
測定量 | 値 | 種別 | Method | Mass | 備考 |
---|---|---|---|---|---|
磁束密度 | 0.4 nT | - | - | - | - |
Application of the MEGA-WAVE instrument caused an increase in EEG power in the frequency bands Alpha2, Beta1 and Beta2 during and after irradiation. Operation of the mobile telephone caused an increase in the same frequency bands with a delay of approximately 15 minutes after irradiation.
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