Study type: Medical/biological study (experimental study)

Analysis of fractal dimension of EEG signals under mobile phone radiation. med./bio.

Published in: IEEE International Conference on Signal Processing, Informatics, Communication and Energy Systems (SPICES), 2015. IEEE, 2015: 1-5, ISBN 9781479918218

Aim of study (acc. to author)

The effects of exposure of subjects to the electromagnetic field of mobile phones on the brain activity should be investigated.

Background/further details

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.

Endpoint

Exposure

Exposure Parameters
Exposure 1:
Exposure duration: continuous for 5 minutes/position/phone (20 minutes in total)
-

Exposure 1

Main characteristics
Frequency
Type
Exposure duration continuous for 5 minutes/position/phone (20 minutes in total)
Exposure setup
Exposure source
Setup 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
Parameters

No parameters are specified for this exposure.

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Investigated organ system:
Time of investigation:
  • before exposure
  • during exposure

Main outcome of study (acc. to author)

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.

Study character:

Study funded by

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