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The hypothesis should be tested that an acute exposure of epileptic patients to a 902.4 MHz electromagnetic field from a mobile phone might influence the EEG spiking rate.
Preceding studies indicated an increased cortical excitability and inter-hemispheric connectivity caused radiofrequency exposure, which led to the hypothesis of this study. In 12 volunteers with focal epilepsy and lateralized hemispheric spiking, an EEG was recorded both under real and sham exposure conditions separated by 1 week.
|ばく露時間||continuous for 45 min|
|Repetition frequency||217 Hz|
the signal was additionally pulsed with a frequency of 8.33 Hz
|Distance between exposed object and exposure source||1.5 cm|
|ばく露装置の詳細||a mobile phone was positioned on the left and on the right side of the head, respectively, with the help of a modified helmet; during exposure, the active phone was localized on the side of the head where the patient had the epileptic focus and the other one was deactivated|
|Sham exposure||A sham exposure was conducted.|
Neither the spiking rate nor the risk of incoming seizures was significantly different between expoure and sham exposure, i.e. the clinical status of the patients was not influenced. However, a significant increase of gamma wave spectral power and of inter-hemispheric coherence for beta wave rhythms was found in exposed patients compared to sham exposure.
The authors conclude that the results do not indicate any negative effects of an acute exposure of epileptic patients to a 902.4 MHz electromagnetic field from a mobile phone.