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

[誘導皮膚電位の潜時に対する携帯電話放射電磁界の影響] med./bio.

Effect of electromagnetic fields emitted by cellular phones on the latency of evoked electrodermal activity.

掲載誌: Int J Neurosci 2006; 116 (3): 321-329

この研究は、ヒトの中枢神経系(CNS)の誘発ニューロン活動に対する携帯電話放射電磁界(CPEMF)の影響を調べた。CNSの誘発ニューロン活動は、交感神経系活動の指標である皮膚電気活動(EDA)の発生および表れ方に関係づけられた。その結果、EDA(または皮膚抵抗反応; SRR)の潜時は、携帯電話の使用頭側に関係なく、CPEMFばく露により、約200ミリ秒延長した;EDA-2経路の半球非対称性(右手応答者では、左手より右手の方がSRR潜時が短いこと)が、CPEMFばく露により歪められた、と報告している。

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研究目的(著者による)

To study the effect of electromagnetic fields emitted by cellular phones on the evoked neuronal activity of central nervous system relating to generation of electrodermal activity (an index of sympathetic nervous system activity) and to study the usefulness of electrodermal activity in the asseessment of cellular phone effect on the central nervous system.

詳細情報

Electrodermal activity is a common term for all electrical phenomena in skin and results from eccrine sweat glands activity driven by sympathetic cholinergic neurons.
Patellar tendon stimulation (left or right, to study the effect of brain asymmetry) was used to activate the central nervous system regions (EDA-2) responsible from the generation of electrodermal activity. Electrode arrangements at the palmar region of both hands were used to measure the evoked bilateral electrodermal activity.

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 5 min
-

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 5 min
Modulation
Modulation type pulsed
Repetition frequency 217 Hz
ばく露装置
ばく露の発生源/構造
  • セルラ-電話
チャンバの詳細 The subjects in a quiet room remained relaxed in the supine position with their eyes closed.
ばく露装置の詳細 Two identical mobile phones were held close to the ear but not touching the subject's head by an adjustable support. Both phones were powered in standby mode except for planned EMF application. Alert type for the incoming calls was set to quiet mode so that the subjects were unaware whether a call was incoming or not. Common ringing call for five minutes was used.
Sham exposure A sham exposure was conducted.
Additional information Only one of the phones was activated in quiet call mode. There were three different exposure conditions: sham, ipsilateral, and contralateral (to the brain site primarily activated by patellar tendon stimulation) under double-blind conditions.
パラメータ

No parameters are specified for this exposure.

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)

Under sham exposure the latency of skin resistence response was significantly shorter on the right for right-handed responders. Cellular phone exposure not only affected this asymmetry, but also increased the skin resistence latency approximately 200 ms irrespective of the head site next to mobile phone used.
Because the central nervous system regions including EDA-2 are also involved in tasks of motor timing and time estimation, delayed response in this neuronal network due to cellular phone exposure may increase the response time of mobile phone users. Therefore, the data point to the potential risks of mobile phones on the function of central nervous system and consequently, possible increase in the risk of phone-related driving hazards.

研究の種別:

研究助成

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