[REM suppression induced by digital mobile radio telephones]

In the present study we investigated the effects of pulsed high-frequency electromagnetic fields irradiated by digital mobile radio telephones on sleep in healthy humans. Besides a hypnotic effect with shortening of sleep onset latency, a REM suppressive effect with reduction of duration and percentage of REM sleep was found under exposure to the field. Moreover, spectral analysis revealed an increased spectral power density of the EEG signal during REM sleep, especially in the alpha frequency band. These results emphasise the necessity to carry out further investigations on the interaction of this type of electromagnetic fields and the human organism.