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

[携帯電話様の放射ばく露を受けた青少年の脳活動に感受性上昇は見られず] med./bio.

No increased sensitivity in brain activity of adolescents exposed to mobile phone-like emissions.

掲載誌: Clin Neurophysiol 2013; 124 (7): 1303-1308

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研究目的(著者による)

To study the effects of radiofrequency electromagnetic fields on the brain physiology of adolescents.

詳細情報

Different studies have shown an influence of pulsed radiofrequency electromagnetic fields on the wake and sleep EEG in adults. In 2006, the WHO highlighted that further radiofrequency electromagnetic field provocation studies on children of different ages are required to estimate the risks, especially of mobile phone usage. Therefore, in the present study, adolescents were examined.
During exposure (low SAR (0.35 W/kg), high SAR (1.4 W/kg) or sham exposure at weekly intervals), 22 adolescents performed cognitive tasks. EEG was recorded during baseline (before exposure), immediately after, and 30 and 60 min after exposure.

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 900 MHz
Modulation type: pulsed
ばく露時間: continuous for 30 min
  • SAR: 1.4 W/kg peak
ばく露2: 900 MHz
Modulation type: pulsed
ばく露時間: continuous for 30 min
  • SAR: 0.35 W/kg peak

ばく露1

主たる特性
周波数 900 MHz
タイプ
  • electromagnetic field
ばく露時間 continuous for 30 min
Modulation
Modulation type cf. additional information, pulsed
Additional information

GSM handset-like modulation

ばく露装置
ばく露の発生源/構造
  • patch antenna
ばく露装置の詳細 participants seated between two planar antennas (left active only); attached electrode leads (for EEG recording) oriented horizontally to the emitted field
Sham exposure A sham exposure was conducted.
パラメータ
測定量 種別 Method Mass 備考
SAR 1.4 W/kg peak - - -

ばく露2

主たる特性
周波数 900 MHz
タイプ
  • electromagnetic field
ばく露時間 continuous for 30 min
Modulation
Modulation type cf. additional information, pulsed
Additional information

GSM handset-like modulation

ばく露装置
ばく露の発生源/構造
  • E1と同じ装置
Sham exposure A sham exposure was conducted.
パラメータ
測定量 種別 Method Mass 備考
SAR 0.35 W/kg peak - - -

Reference articles

  • Schmid MR et al. (2012): [睡眠時脳波の変化:パルス変調が異なる無線周波電磁界の影響]
  • Murbach M et al. (2012): [携帯電話のELF及びRF電磁界と中枢神経系との相互作用の仮説を研究するためのばく露システム]
  • Boutry CM et al. (2008): [ヒトボランティア研究に用いる各種のRFばく露装置のドシメトリ評価と比較]
  • Regel SJ et al. (2007): [パルス無線周波数放射は認知作業成績と覚醒時脳波に影響を及ぼす]
  • Huber R et al. (2005): [局所的な大脳血流にパルス変調ラジオ周波数電磁界へのばく露は影響する]
  • Huber R et al. (2002): [携帯電話電磁界は局所大脳血流と睡眠時、覚醒時EEGを変える]

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)

No clear significant exposure-related effects on the waking EEG or cognitive functions were found in adolescents.
The data did not provide evidence for a higher sensitivity of adolescents to radiofrequency electromagnetic fields than adults.

研究の種別:

研究助成

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