ID Number		1789
Study Type		Human / Provocation
Model		900 & 1800 MHz (GSM) exposure to humans and analysis of sleep
Details		Volunteers (n = 38 self reported hypersensitive, n = 33 non-hypersensitive) were exposed to 900 MHz (GSM) RF to the left hemisphere using a patch panel antenna system for 3 hours at 1.4 W/kg (including periods of DTx and non-DTx), followed by sleeping 1 hour later. The authors report exposure increased time to reach the first cycle of deep sleep (i.e., increased REM sleep) and decreased stage 4 sleep. They further suggest this could be an adverse effect in reducing recovery sleep. Non-hypersensitive individuals reported more headaches during exposure vs. sham, although neither group was able to accurately detect the RF. The authors also reported improved learning and reaction time with RF exposure. Other studies by the group suggest increased cortisol levels following exposure in late evening samples, and suggest an unspecified stress making the subjects more alert, with more difficulty falling asleep. AUTHORS' ABSTRACT: Lowden et al. 2019 (IEEE #7204): Studies on sleep after exposure to radiofrequency electromagnetic fields have shown mixed results. We investigated the effects of double-blind radiofrequency exposure to 1,930-1,990MHz, UMTS 3G signalling standard, time-averaged 10g specific absorption rate of 1.6Wkg-1 on self-evaluated sleepiness and objective electroencephalogram architecture during sleep. Eighteen subjects aged 18-19years underwent 3.0hr of controlled exposure on two consecutive days 19:45-23:00hours (including 15-min break); active or sham prior to sleep, followed by full-night 7.5hr polysomnographic recordings in a sleep laboratory. In a cross-over design, the procedure was repeated a week later with the second condition. The results for sleep electroencephalogram architecture showed no change after radiofrequency exposure in sleep stages compared with sham, but power spectrum analyses showed a reduction of activity within the slow spindle range (11.0-12.75Hz). No differences were found for self-evaluated health symptoms, performance on the Stroop colour word test during exposure or for sleep quality. These results confirm previous findings that radiofrequency post-exposure in the evening has very little influence on electroencephalogram architecture but possible on spindle range activity.
Findings		Effects
Status		Completed With Publication
Principal Investigator		Karolinska Institute, Sweden - bengt.arnetz@pubcare.uu.se
Funding Agency		FGF, Germany, EU, MMF
Country		SWEDEN
References		Arnetz , B et al. PIERS Online, (2007) 3:1148-1150 Lowden, A et al. Bioelectromagnetics, (2011) 32:4-14 Lowden, A et al. J Sleep Res., (2019) e12813:-
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