Study type: Medical/biological study (experimental study)

Does the brain detect 3G mobile phone radiation peaks? An explorative in-depth analysis of an experimental study. med./bio.

Published in: PLoS One 2015; 10 (5): e0125390

Aim of study (acc. to author)

The effects of intensity peaks of an acute exposure of human subjects to a 3G mobile phone electromagnetic field on event related potentials in the EEG should be investigated.

Background/further details

The present study reanalyzed the data acquired by Roggeveen et al. 2015.
31 young, female subjects were exposed on two different days within a 1-hour test session, respectively. On one day, the mobile phone was placed at the subject's ear and on the other day it was placed on the subject's chest (cardiac region). In each session, 15 minutes of sham exposure as pre-exposure condition, then 15 minutes of exposure and finally 15 minutes of sham exposure as post-exposure condition were recorded. Additionally, 15 minutes at the beginning or at the end of each session were randomly chosen for sham exposure without EEG recording to ensure blinding.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 1.9291–1.9397 GHz
Exposure 2: 1.9291–1.9397 GHz

General information

background radiation level was 0.1 W/m2

Exposure 1

Main characteristics
Frequency 1.9291–1.9397 GHz
Type
Additional info exposure of ear
Additional info phone was in dialing mode and muted during exposure
Exposure setup
Exposure source
Chamber an electrically non-shielded room
Setup a dialing mobile phone was fixed to the left ear (comparable to a typical dialing position at an angle of approximately 45 degrees) with an elastic band; the experimenter entered the room after each 15-minutes (sham) exposure session and changed the phone
Sham exposure A sham exposure was conducted.
Additional info non-functioning mobile phone replicas were used for sham exposure
Parameters
Measurand Value Type Method Mass Remarks
SAR 0.69 W/kg - - partial body for head, value according to manufacturer
power density 5.6 W/m² maximum measured - during exposure peaks

Exposure 2

Main characteristics
Frequency 1.9291–1.9397 GHz
Type
Additional info exposure of chest
Additional info phone was in dialing mode and muted during exposure
Exposure setup
Exposure source
Chamber an electrically non-shielded room
Setup a dialing mobile phone was fixed to the chest (adjacent to the left side of the sternum, bordering the sternoclavicular joint) with an elastic band; the experimenter entered the room after each 15-minutes (sham) exposure session and changed the phone
Sham exposure A sham exposure was conducted.
Additional info non-functioning mobile phone replicas were used for sham exposure
Parameters
Measurand Value Type Method Mass Remarks
SAR 0.69 W/kg - - partial body for head, value according to manufacturer
power density 5.6 W/m² maximum measured - during exposure peaks

Reference articles

Exposed system:

Methods Endpoint/measurement parameters/methodology

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

Main outcome of study (acc. to author)

Exposure of the ear resulted in a significant increase of the EEG activity in the frontal and central cortical regions compared to sham exposure conditions. Further analyses of the ear exposure condition showed a significant increase of activity in the 500-1000 ms post-exposure peak interval for almost every EEG location measured.
The authors conclude that intensity peaks of an acute exposure of the human ear to a 3G mobile phone electromagnetic field could result in event related potentials in the EEG, what indicates that the brain can detect these intensity peaks. However, the biological relevance of this is unknown.

Study character:

Study funded by

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