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

[40 Hz, 70 Hz変調450 MHzマイクロ波による各被験者のEEGの変化] med./bio.

Individual changes in human EEG caused by 450 MHz microwave modulated at 40 and 70 Hz.

掲載誌: Environmentalist 2007; 27 (4): 511-517

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研究目的(著者による)

To study the effect of microwaves modulated at different frequencies (40 and 70 Hz) on human electroencephalographic (EEG) rhythms.

詳細情報

15 subject participated (eight males, 7 females). All subjects passed two EEG recordings on two different days under microwave exposure and sham exposure.

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 450 MHz
ばく露時間: 40 min. = 10 cycles of each modulation frequency (1 min. on - 1 min. off)

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. = 10 cycles of each modulation frequency (1 min. on - 1 min. off)
Modulation
Modulation type cf. additional information
Additional information

pulse-modulated modulation frequencies: 40 Hz and 70 Hz duty cycle = 50%

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
ばく露装置の詳細 antenna placed near the left side of the test person's head
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 - 推定値 - at the scalp
SAR 0.35 W/kg - - - -

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)

450 MHz microwave exposure modulated at 40 Hz caused statistically significant changes in the EEG time variability (i.e. LDLVP) in four subjects (26.7%) and energy variations (increase in energy of beta wave (beta 2) frequency band) in two subjects (13.3%). The LDLVP analysis and relative changes in EEG energy did not detect significant effects of microwave exposure for the whole group.
Statistical evaluation performed for the whole group revealed significant difference between exposed and sham exposed EEG only for the beta ratio (as parameter for energy distribution).
In conclusion, the main trend of changes in the present study was the increase in the EEG beta wave energy and the effect was more evident at the modulation frequency closer to the physiological EEG rhythms (40 Hz).

研究の種別:

研究助成

関連論文