Study type: Medical/biological study (experimental study)

No influence of 20 and 400 µT, 50 Hz magnetic field exposure on cognitive function in humans. med./bio.

Published in: Bioelectromagnetics 2004; 25 (8): 592-598

Aim of study (acc. to author)

To study cognitive effects of a continuous, vertical extremely low frequency magnetic field of 20 and 400 µT 50 Hz in healthy young men during performance on cognitive tests.



Exposure Parameters
Exposure 1: 50 Hz
Exposure duration: 65 min, 4 times, 1 week apart

Exposure 1

Main characteristics
Frequency 50 Hz
Exposure duration 65 min, 4 times, 1 week apart
Additional info vertical field
Exposure setup
Exposure source
Setup coils placed in the three orthogonal directions and fixed to a wood and leather wheel chair in which the test person sat
Sham exposure A sham exposure was conducted.
Measurand Value Type Method Mass Remarks
magnetic flux density 20 µT - - - -
magnetic flux density 400 µT - - - -

Reference articles

  • Crasson M et al. (1999): 50 Hz magnetic field exposure influence on human performance and psychophysiological parameters: two double-blind experimental studies.
  • Crasson M et al. (1993): [Preliminary study of 50 Hz magnetic fields exposure effects on some neuropsychological and neuroendocrinal parameters].

Exposed system:

Methods Endpoint/measurement parameters/methodology

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

Main outcome of study (acc. to author)

No effect of magnetic field exposure was observed on performance. The results do not support the hypothesis that extremely low frequency magnetic field affects human cognitive performance.

Study character:

Study funded by

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