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

[ヒトにおけるデジタル携帯電話ばく露の神経心理学的後遺症] med./bio.

Neuropsychological sequelae of digital mobile phone exposure in humans.

掲載誌: Neuropsychologia 2006; 44 (10): 1843-1848

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研究目的(著者による)

To examine the cognitive effects of digital mobile phone emissions, using well-validated neuropsychological tests, in a large sample size of 120 subjects.

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 60 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 60 min
Modulation
Modulation type pulsed
Duty cycle 12.5 %
Repetition frequency 217 Hz
ばく露装置
ばく露の発生源/構造
  • セルラ-電話
Distance between exposed object and exposure source 1.5 cm
ばく露装置の詳細 The mobile phone was attached to a non-metallic helmet, so that it rested against the subject's left ear with the antenna 1.5 ± 0.5 cm from the head. To prevent subjects from detecting the testing condition by sound or heat, the speaker was removed and the mobile phone was covered with soundproofing material, and a 5 mm thick piece of foam was placed between the phone and the subject's head.
Sham exposure A sham exposure was conducted.
Additional information Each participant attended two testing sessions approx. one week apart with real or sham exposure balanced for order. A double-blind crossover design was employed. For real exposures, the mobile phone was set at full power by a laptop while for sham exposures, the phone was in standby mode.
パラメータ
測定量 種別 Method Mass 備考
電力 0.23 W mean 測定値 - -

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

研究の主なアウトカム(著者による)

Simple and choice reaction times showed strong evidence of impairment indicating that the more basic functions were adversely affected by exposure. In contrast, performance on the Trail Making Test (to test visual motor tracking) improved, supporting the hypothesis that exposure to digital mobile phone improves the information processing speed held in working memory.

研究の種別:

研究助成

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