Study type: Medical/biological study (experimental study)

Mobile-phone pulse triggers evoked potentials. med./bio.

Published in: Neurosci Lett 2010; 469 (1): 164-168

Aim of study (acc. to author)

To study whether a low frequency pulse of the type produced by mobile phones was capable of triggering evoked potentials in 20 volunteers.

Background/further details

Following an acclimation period, there were two experimental periods during which either a fieId or a sham exposure was presented. The order of exposure/sham exposure varied randomly from subject to subject.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 217 Hz
Modulation type: single pulse
Exposure duration: 80 trials of 3 s - 0.7 ms on - 2.9993 s off

Exposure 1

Main characteristics
Frequency 217 Hz
Type
Exposure duration 80 trials of 3 s - 0.7 ms on - 2.9993 s off
Modulation
Modulation type single pulse
Pulse width 0.7 ms
Exposure setup
Exposure source
  • two metal plates, 65 cm apart, located at both sides of the subject's head
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
magnetic flux density 3 µT - - - reference value - at 10 cm from the phone
electric field strength 100 V/m - - - unpertubed field without a head between the plates

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)

A pulse of the type produced by mobile phones was transduced by 90% of the subjects, as indicated by the occurrence of evoked potentials. The implication of the data is that mobile phones trigger evoked potentials at the frequency of 217 Hz during ordinary cell phone use.
The authors conclude that chronic production of the changes in brain activity might be pertinent to the reports of health hazards among mobile phone users.

Study character:

Study funded by

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