two solenoids (diameter: 42 cm) placed on a common axis spaced apart at a distance equal to their radii (21 cm); coils produced a vertical and homogenous field in the space between the coils; the coils were constructed of glaze-insulated copper wire (d = 1.4 mm) and had 240 turns; participants had to put their right hand between the coils; exposure of other body parts was prevented by an iron plate (dimensions: 800 mm x 500 mm x 2 mm) positioned between the coils and participants' body and by covering the coils with a special fabric containing copper fiber
Individuals with IEI-EMF were able to detect the presence of the 50 Hzmagnetic field of 0.5 mT slightly better than by random guessing. while control groups' performance did not differ from chance. Experimental sessions followed by correct decisions were characterized by higher heart rate variability than periods followed by errors. Participants with IEI-EMF had a significantly lower decision criterion when they had to decide about the presence of the magnetic field. This means that they not only had slightly better detection abilities than controls, but they were also more prone to maximize the hit rate at the expense of false alarms in ambiguous cases. Additionally, participants with IEI-EMF exhibited more symptoms at the end of the experiment. IEI-EMF was closely related to concerns about possible harmful effects of electromagneticexposure and to somatosensory amplification. In conclusion, the detection of the magnetic field might be possible for people with IEI-EMF to some extent. Although increased sensibility to magnetic fields may play a role in the development of the IEI-EMF phenomenon, symptoms attributed to the magnetic field seem to be mainly of psychogenic origin.
Witthöft M et al.
Are media warnings about the adverse health effects of modern life self-fulfilling? An experimental study on idiopathic environmental intolerance attributed to electromagnetic fields (IEI-EMF).
Rubin GJ et al.
Do people with idiopathic environmental intolerance attributed to electromagnetic fields display physiological effects when exposed to electromagnetic fields? A systematic review of provocation studies.
Nam KC et al.
Physiological variables and subjective symptoms by 60 Hz magnetic field in EHS and non-EHS persons.
Rubin GJ et al.
Idiopathic environmental intolerance attributed to electromagnetic fields (formerly 'electromagnetic hypersensitivity'): An updated systematic review of provocation studies.
Szemerszky R et al.
Polluted places or polluted minds? An experimental sham-exposure study on background psychological factors of symptom formation in 'Idiophatic Environmental Intolerance attributed to electromagnetic fields'.
Dahmen N et al.
Blood laboratory findings in patients suffering from self-perceived electromagnetic hypersensitivity (EHS).