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

[さまざまな低周波で変調されたマイクロ波放射のヒト脳波への影響] med./bio.

Effect of modulated at different low frequencies microwave radiation on human EEG.

掲載誌: Environmentalist 2009; 29 (2): 215-219

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研究目的(著者による)

To study whether the effect of low-level microwave irradiation on human brain differs at different modulation frequencies.

詳細情報

The 450 MHz microwave exposure modulated at 40 and 70 Hz (15 subjects) and 217 and 1,000 Hz (19 subjects) frequencies was applied. The data of previous studies at 7, 14 and 21 Hz modulation were included into the analysis (Hinrikus et al. 2008a and Hinrikus et al. 2008b).

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 450 MHz
Modulation type: pulsed
ばく露時間: 40 min
ばく露2: 450 MHz
Modulation type: pulsed
ばく露時間: 40 min

ばく露1

主たる特性
周波数 450 MHz
タイプ
  • electromagnetic field
ばく露時間 40 min
Modulation
Modulation type pulsed
Duty cycle 50 %
Additional information

fmod1 = 40 Hz, fmod2 = 70 Hz pulse 1 min on - 1 min off - repeated 10 times with fmod1 and 10 times withfmod2

ばく露装置
ばく露の発生源/構造
  • 13 cm quarter-wave antenna
Distance between exposed object and exposure source 10 cm
Sham exposure A sham exposure was conducted.
パラメータ
測定量 種別 Method Mass 備考
電力 1 W - - - -
電力密度 0.16 mW/cm² spatial average 推定値 - -

ばく露2

主たる特性
周波数 450 MHz
タイプ
  • electromagnetic field
ばく露時間 40 min
Modulation
Modulation type pulsed
Duty cycle 50 %
Additional information

fmod1 = 217 Hz, fmod2 = 1000 Hz pulse 1 min on - 1 min off - repeated 10 times with fmod1 and 10 times withfmod2

ばく露装置
ばく露の発生源/構造
  • E1と同じ装置
Distance between exposed object and exposure source 10 cm
Sham exposure A sham exposure was conducted.
パラメータ
測定量 種別 Method Mass 備考
電力 1 W - - - -
電力密度 0.16 mW/cm² spatial average 推定値 - -

Reference articles

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 showed that microwave exposure increased the EEG energy at EEG frequencies lower or close to the modulation frequency (different modulation frequencies affected different EEG frequency bands). No effect was detected at EEG frequencies higher than the modulation frequency. Statistically significant alterations were caused by exposure in the EEG alpha wave and beta wave frequency bands; no significant effect was found in the theta wave frequency band.
The results suggest that telecommunication devices with complex spectrum of modulation frequencies like mobile phones can affect human EEG frequency bands.

研究の種別:

研究助成

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