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

[心拍変動を指標とした誘発研究において2.4GHzコードレス電話からのマイクロ波放射は自律神経系に影響することが示された] med./bio.

Provocation study using heart rate variability shows microwave radiation from 2.4 GHz cordless phone affects autonomic nervous system.

掲載誌: Non-thermal effects and mechanisms of interaction between electromagnetic fields and living matter Mattioli 1885, 2010, ISBN 9788862611664: 273-300

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研究目的(著者による)

To study the effect of pulsed microwave exposure on heart rate variability in humans.

詳細情報

25 subjects participated (80 % females; age 37-79 years old).

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 2.4 GHz
Modulation type: pulsed
ばく露時間: continuous for 3 min

ばく露1

主たる特性
周波数 2.4 GHz
タイプ
  • electromagnetic field
ばく露時間 continuous for 3 min
Modulation
Modulation type pulsed
Repetition frequency 100 Hz
ばく露装置
ばく露の発生源/構造
  • cordless phone base station (similar to DECT)
ばく露装置の詳細 tests were done at two different locations (Golden and Boulder, Colorado, USA); GS Filters (Graham Stetzer filters, that filter frequencies between 4 kHz and 100 kHz) were installed at both locations before testing; phone (base station) placed 30 cm - 50 cm from the subject's head
Sham exposure A sham exposure was conducted.
パラメータ
測定量 種別 Method Mass 備考
電力密度 3 µW/cm² minimum - - -
電力密度 5 µW/cm² maximum - - -

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:
  • ばく露前
  • ばく露中
  • ばく露後

研究の主なアウトカム(著者による)

Results of the questionnaire: Based on self-assessments, participants classified themselves as extremely electrosensitive (24 %), moderately (n=16 %), slightly (16 %), not sensitive (8 %) or with no opinion (36 %) about their electrosensitivity. The top 10 symptoms experienced by those claiming to be electrosensitive include memory problems, difficulty concentrating, eye problems, sleep disorder, feeling unwell, headache, dizziness, tinnitus, chronic fatigue, and heart palpitations. The five most common objects allegedly causing sensitivity were fluorescent lights, antennas, mobile phones, WiFi, and cordless phones.
Data of the provocation study: 40 % of the subjects experienced some changes in their heart rate variability attributable to the pulsed microwave exposure. For some the response was extreme (tachycardia), for others moderate to mild (changes in sympathetic nervous system and/or parasympathetic nervous system) and for some there was no observable reaction either because of high adaptive capacity or because of systemic neurovegetative exhaustion.
This is the first study that documents immediate and dramatic changes in both heart rate and heart rate variability associated with microwave exposure at levels well below (0.5 %) guidelines in Canada and the United States (1000 µW/cm²).

研究の種別:

研究助成

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