74 male subjects were randomly assigned to one of five groups, which differed in (1) the type of information they were given concerning the expected magnetic field effect on performance in cognitive tests (positive = enhancement of the performance; negative = impairment of the performance; neutral) and (2) the type of exposure (real or sham exposure). Three groups were sham-exposed with positive (group+), negative (group-) and neutral information (group+/-); one group was really exposed with neutral information (exposure group) and one group was not exposed, they did not receive any field-related information (control group). All the subjects, except the control group, were led to believe that they would be exposed to a magnetic field of 400 µT.
The subjects wore a magnetic helmet for exposing the head to a homogeneous50 HzMF. The helmet is a cubic structure formed by six Helmholtz coils distributed in three orthogonal directions. There was no perceptible warming nor noise under experimental conditions.
Crasson M et al.
(1999):
50 Hz magnetic field exposure influence on human performance and psychophysiological parameters: two double-blind experimental studies
No significant difference was found among the five groups depending on the type of information and the type of exposure in cognitive performance, psychological and physiological parameters. The type of information given failed to induce expected changes in parameters measured.
Akramova MS et al.
(2016):
Possibility of registration of changes in the human body at influence of harmful production factors by means of the polygraph
Domotor Z et al.
(2016):
Dispositional aspects of body focus and idiopathic environmental intolerance attributed to electromagnetic fields (IEI-EMF)
Li L et al.
(2014):
No effects of power line frequency extremely low frequency electromagnetic field exposure on selected neurobehavior tests of workers inspecting transformers and distribution line stations versus controls
Crasson M et al.
(2005):
Absence of daytime 50 Hz, 100 microT(rms) magnetic field or bright light exposure effect on human performance and psychophysiological parameters
Rubin GJ et al.
(2005):
Electromagnetic hypersensitivity: a systematic review of provocation studies
Delhez M et al.
(2004):
No influence of 20 and 400 µT, 50 Hz magnetic field exposure on cognitive function in humans
Crasson M
(2003):
50-60 Hz electric and magnetic field effects on cognitive function in humans: a review
Kurokawa Y et al.
(2003):
No influence of short-term exposure to 50-Hz magnetic fields on cognitive performance function in human
Frick U et al.
(2002):
Risk perception, somatization, and self report of complaints related to electromagnetic fields - a randomized survey study
Lyskov E et al.
(2001):
Provocation study of persons with perceived electrical hypersensitivity and controls using magnetic field exposure and recording of electrophysiological characteristics
Lonne-Rahm S et al.
(2000):
Provocation with stress and electricity of patients with "sensitivity to electricity"
Crasson M et al.
(1999):
50 Hz magnetic field exposure influence on human performance and psychophysiological parameters: two double-blind experimental studies
Repacholi MH et al.
(1999):
Interaction of static and extremely low frequency electric and magnetic fields with living systems: health effects and research needs
Trimmel M et al.
(1998):
Effects of an ELF (50 Hz, 1 mT) electromagnetic field (EMF) on concentration in visual attention, perception and memory including effects of EMF sensitivity
Andersson B et al.
(1996):
A cognitive-behavioral treatment of patients suffering from "electric hypersensitivity". Subjective effects and reactions in a double-blind provocation study
