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The effects of exposure of subjects to the electromagnetic field of mobile phones on the brain activity should be investigated.
The EEG of 35 healthy subjects was recorded during 5 consecutive trials of 5 minutes with different exposure conditions, respectively: 1) resting EEG without exposure, 2) mobile phone 1 placed at right ear, 3) mobile phone 1 placed at vertex (Cz position), 4) mobile phone 2 placed at right ear and 5) mobile phone 2 placed at vertex. Trial 1 was used as the control condition, trials 2-5 were the exposure conditions.
|ばく露装置の詳細||two different phones (remark EMF-Portal: no further information given) were used for exposure at two different skull positions (right ear and vertex); during the procedure, the volunteers were instructed to lie down and relax and the phones were switched on during exposure (in talking mode); the volunteers were unaware of the instant of switching the mobile phones|
No parameters are specified for this exposure.
Significant changes in the total EEG during the exposure conditions compared to the control condition were found at two electrodes only. Regarding the individual brain waves, three electrodes showed significant changes solely in the gamma wave band during the exposure conditions compared to the control condition.
(Remark EMF-Portal: the different mobile phones and exposure positions were not analyzed individually.)
The authors conclude that exposure of subjects to the electromagnetic field of mobile phones has no effect on the brain activity.