Study type: Medical/biological study (experimental study)

Individual subject sensitivity to extremely low frequency magnetic field. med./bio.

Published in: Neurotoxicology 2006; 27 (4): 534-546

Aim of study (acc. to author)

This study was performed to examine within- and between-subject differences in postural tremor charcteristics in relation to extremely low frequency magnetic field exposure.

Background/further details

Twenty-four healthy, self-reported not hypersensitive to magnetic field men aged between 20 and 50 years participated to a session of 65 minutes duration. The subjects were asked to maintain a fixed position with their index finger while postural tremor was recorded under different magnetic fields "on"/"off" set-ups.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 50 Hz
Exposure duration: 14 min exposure, 3 min rest, 14 min sham exposure, 3 min rest, 14 min exposure, 3 min rest, 14 min sham exposure

Exposure 1

Main characteristics
Frequency 50 Hz
Type
Waveform
Exposure duration 14 min exposure, 3 min rest, 14 min sham exposure, 3 min rest, 14 min exposure, 3 min rest, 14 min sham exposure
Exposure setup
Exposure source
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
magnetic flux density 1 mT - - - -

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)

Due to the large within- and between-subject variability, no statistical analysis could be done. Subjects were seperated in two groups concerning tremor amplitude seize into "high" and "low" amplitude tremor. Subjects with high amplitude tremor seemed to be more responsive to magnetic field exposure compared to low tremor amplitude.

Study character:

Study funded by

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