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

[聴覚オズボールパラダイムでの事象関連電位諸成分および早期ガンマ波同期現象に対する3G携帯電話20分間照射の影響] med./bio.

Effects of twenty-minute 3G mobile phone irradiation on event related potential components and early gamma synchronization in auditory oddball paradigm.

掲載誌: Neuroscience 2008; 157 (2): 453-462

The detailed summary of this article is not available in your language or incomplete. Would you like to see a complete translation of the summary? Then please contact us →

研究目的(著者による)

To investigate the potential effects of 20 min irradiation from an UMTS-mobile phone on event related potentials evoked by standard and target tones in an auditory oddball paradigm.

詳細情報

In two seperate sessions, 29 healthy students were exposed and sham-exposed between two recording blocks of an oddball paradigm. Before and after exposure participants were presented with a random series of 50 ms tone burst at a mean repetition rate of 1500 ms. The subjects task was to count the appearance of targets (=deviant tone burst).

影響評価項目

ばく露

ばく露 パラメータ
ばく露1:
  • unspecified
Modulation type: pulsed
ばく露時間: continuous for 20 min
  • SAR: 0.39 W/kg maximum (1 g)
  • SAR: 1.75 W/kg maximum (1 g)
  • SAR: 3.75 W/kg maximum (partial body) (at the skin level of the outer ear)

ばく露1

主たる特性
周波数
  • unspecified
タイプ
  • electromagnetic field
ばく露時間 continuous for 20 min
Modulation
Modulation type pulsed
Repetition frequency 1,500 Hz
ばく露装置
ばく露の発生源/構造
  • standard mobile phone Nokia 6650
ばく露装置の詳細 mobile phone connected to an external patch antenna which was mounted on a plastic head set; as for applicator a 0.5 mm thick single sided round dual band patch antenna with a diameter of 31 mm was used
Sham exposure A sham exposure was conducted.
パラメータ
測定量 種別 Method Mass 備考
SAR 0.39 W/kg maximum 計算値 1 g -
SAR 1.75 W/kg maximum 測定値 1 g -
SAR 3.75 W/kg maximum 推定値 partial body at the skin level of the outer ear

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)

The analysis of the percentage score of correctly counted target stimuli and the auditory thresholds before and after exposure and sham exposure indicated no effect of electromagnetic fields on task performance. Standard stimuli evoked the N100, N200 and P200 component and targets evoked the P300 response. No significant effects of electromagnetic field exposure on the amplitude and latency of the event related potential components were found. Target stimuli evoked stronger gamma wave-frequency band response than standards, however no effect of electromagnetic fields on the magnitude of gamma wave acitivity was found.

研究の種別:

研究助成

関連論文