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

[ヒトの感覚皮質に対する30分間の携帯電話使用の影響] med./bio.

Effects of thirty minutes mobile phone use on the human sensory cortex.

掲載誌: Clin Neurophysiol 2006; 117 (4): 900-905

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研究目的(著者による)

To study whether the pulsed radiofrequency electromagnetic field emitted by a mobile phone for 30 min has short-term effects on human somatosensory evoked potentials.

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 800 MHz
Modulation type: pulsed
ばく露時間: continuous for 30 min
  • 電力: 0.8 W peak (simulator-controlled)
  • 電力: 0.27 W mean (simulator-controlled)
  • SAR: 0.054 W/kg average over mass (10 g) (± 0.02 W/kg, in the brain)

ばく露1

主たる特性
周波数 800 MHz
タイプ
  • electromagnetic field
ばく露時間 continuous for 30 min
Modulation
Modulation type pulsed
Pulse width 6.7 ms
Duty cycle 33.5 %
Repetition frequency 50 Hz
Additional information

usual Japanese mobile phone signal: π/4 shifted QPSK and 3 channel TDMA with a frame period of 20 ms and time slots of 6.7 ms

ばく露装置
ばく露の発生源/構造
  • セルラ-電話
  • handset connected to a communication tester, at maximum output power
Distance between exposed object and exposure source 4 cm
ばく露装置の詳細 The handset was oriented in the normal use position over the right ear with the antenna located about 4 cm from head.
Sham exposure A sham exposure was conducted.
Additional information Since the subjects were unable to hold the phone at a fixed position during the experiment, the SAR in the brain was not mathematically constant.
パラメータ
測定量 種別 Method Mass 備考
電力 0.8 W peak 備考を参照のこと。 - simulator-controlled
電力 0.27 W mean 備考を参照のこと。 - simulator-controlled
SAR 0.054 W/kg average over mass 測定値 10 g ± 0.02 W/kg, in the brain

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
  • ばく露後

研究の主なアウトカム(著者による)

30 min mobile phone use had no short-term effects on the human sensory cortex. Neither somatosensory evoked potentials nor their recovery function was affected by exposure.

研究の種別:

研究助成

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