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Medical/biological study (experimental study)

Possibility of registration of changes in the human body at influence of harmful production factors by means of the polygraph.

Published in: IEEE 11th International Forum on Strategic Technology (IFOST), 2016.

Aim of study (acc. to author)

To investigate the effects of 50 Hz magnetic fields on the human body.
Background/further details: In a first experiment, several parameters (see methods) were measured in the probands for 1.5 to 2 minutes by a polygraph (popularly referred to as a lie detector). Afterwards, a helmet containing the coils was put on and the volunteer was exposed to the magnetic field for 4.5 to 5 minutes while the measurement parameters were recorded.
In a second experiment, the helmet was directly put on. Parameters were recorded for 1.5 minutes without the magnetic field. Then the magnetic field was switched on for 2 minutes (75-80 A/m). Afterwards, the magnetic field was switched off and the recording proceeded for 1 minute. This procedure was followed by an additional exposure for 1.5 minutes to a stronger magnetic field strength (150-160 A/m) while parameters were recorded.
60 probands were examined (male and female). However, it is not clear if all probands took part in both experiments and if both experiments were conducted on the same day.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 50 Hz
Exposure duration: 4.5 to 5 minutes
first experiment
Exposure 2: 50 Hz
Exposure duration: 2 minutes
second experiment
Exposure 3: 50 Hz
Exposure duration: 1.5 minutes
second experiment
Exposure 1
Main characteristics
Frequency 50 Hz
Type
Exposure duration 4.5 to 5 minutes
Additional info first experiment
Exposure setup
Exposure source
Setup special helmet with six coil windings; originally designed to protect from magnetic fields but here used to expose the human head; two coils were powered usually (remark EMF-Portal: not stated which coils were powered)
Parameters
Measurand Value Type Method Mass Remarks
magnetic field strength 75 A/m minimum measured - -
magnetic field strength 80 A/m maximum measured - -
Exposure 2
Main characteristics
Frequency 50 Hz
Type
Exposure duration 2 minutes
Additional info second experiment
Exposure setup
Exposure source
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
magnetic field strength 75 A/m minimum measured - -
magnetic field strength 80 A/m maximum measured - -
Exposure 3
Main characteristics
Frequency 50 Hz
Type
Exposure duration 1.5 minutes
Additional info second experiment
Exposure setup
Exposure source
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
magnetic field strength 150 A/m minimum measured - -
magnetic field strength 160 A/m maximum measured - -
Exposed system:
  • human
  • partial body: head

Methods Endpoint/measurement parameters/methodology

Investigated material:
Time of investigation:
  • before exposure
  • during exposure
  • after exposure

Main outcome of study (acc. to author)

The heart rate and the electrodermal activity were significantly different between the exposed and the unexposed condition (probably in the first experiment).
Changes between all conditions (before exposure, during exposure, after exposure, high exposure) were statistically significant in all parameters (probably in the second experiment).
Remark EMF-Portal: it is not directly stated which results belong to which experiment and if measured values were increased or decreased.
The authors conclude that 50 Hz magnetic fields could have an inpact on the human body.
Study character:

Study funded by

  • not stated/no funding

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