Study type: Medical/biological study (experimental study)

Physiological variables and subjective symptoms by 60 Hz magnetic field in EHS and non-EHS persons. med./bio.

Published in: IEEE 33th Annual International Conference of the Engineering in Medicine and Biology Society (EMBC), 2011. IEEE, 2011, ISBN 9781457715891: 1925-1928

Aim of study (acc. to author)

To study both physiological changes (heart rate, respiratory rate, and heart rate variability) and subjective symptoms to determine the origin of electrosensitivity.

Background/further details

Two groups of 15 volunteers with self-reported electromagnetic hypersensitivity (10 males/5 females) and 16 non-electromagnetic hypersensitivity subjects (11 males/5 females) participated and were sham exposed and exposed on two different days. Physiological data were recorded for five minutes at four different stages: pre-exposure rest, after 11 minutes of exposure, after 27 minutes of exposure, and 11 minutes after exposure termination. The subjects were asked for symptoms during 1, 10, and 26 of exposure and 10 minutes after exposure termination.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 60 Hz
Exposure duration: continuous for 32 min

Exposure 1

Main characteristics
Frequency 60 Hz
Type
Exposure duration continuous for 32 min
Exposure setup
Exposure source
Distance between exposed object and exposure source 20 cm
Setup 20 cm high coil with a radius of 20 cm and 2000 turns of wire, covered with fabric; test person sitting on a chair with the coil 20 cm above the top of the head
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
magnetic flux density 12.5 µT - - - -

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)

The magnetic field exposure did not have any effect on physiological variables or subjective symptoms in either group.

Study character:

Study funded by

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