この研究は、動作中の携帯電話(MP)へのばく露が脳電図(EEG)に影響を与えるか否かを調べた。完全にバランスさせたクロスオーバー、単ブラインド法により、被験者24人で実験を行った。被験者全員について、MPオンまたはオフの2条件下で、安静時EEGと聴覚刺激に対する位相同期神経反応の両方を計測した。その結果、MPばく露時にEEGが変化し、1-4Hzの活動減少(右半球側)8-12Hzの活動増加(中央後部側)が見られた;MPばく露の初期に、位相同期神経反応が変化した、と報告している。
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To test whether exposure to an active mobile phone affects EEG as a function of time.
周波数 | 900 MHz |
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タイプ |
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ばく露時間 | continuous for 3 x 20 min |
Modulation type | pulsed |
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Pulse width | 0.577 ms |
Repetition frequency | 217 Hz |
Additional information |
Spoken extracts from a radio play (not audible to the subject) were played to the sending phone via a CD player at approximately 80 dB SPL (peak level). |
ばく露の発生源/構造 |
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Distance between exposed object and exposure source | 5 cm |
ばく露装置の詳細 | The mobile phone was positioned 5 cm radial to the subject's scalp midway between Oz and Pz, using a non-metallic external bracket. The phone was removed and switched on or off outside of the recording room before the start of each condition. The purported EMF attenuator (Q Link Ally) was positioned over the subject's chest (left sternum) using a comfortable chest-strap and was operated from a separate room. |
Additional information | A 20 min series of tasks were performed 3 times, each with one of the 3 following (counterbalanced and single-blind) exposure conditions: exposure to an active mobile phone (MP) concurrent exposure to an active MP and a purported EMF attenuator both MP and EMF attenuator deactivated (control). |
Exposure to an active mobile phone affects neural functions in humans, altering both resting EEG patterns and the evoked neural response to auditory stimuli, with a number of these changes occuring as a function of exposure duration.
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