Effects of Wireless Communication Signals on Symptoms & Sleep

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-------[govtwatch4] The Effects of 884 MHz GSM Wireless Communication Signals on Self-reported Symptom and Sleep (EEG)- An Experimental Provocation StudyMon, 26 Nov 2007 18:37:52 -0800Sardar < sardar govtwatch4 The Effects of 884 MHz GSM Wireless Communication Signals onSelf-reported Symptom and Sleep (EEG)- An Experimental Provocation Study Bengt B. Arnetz, Torbjorn Akerstedt, Lena Hillert, Arne Lowden, NielsKuster, and Clairy Wiholm [PDF Full Text (275 KB)] Downloads: 694 Abstract: In the current study we assessed possible effects of prolonged (3hours) exposure to 884 MHz GSM wireless communication signals onself-reported symptoms, cognitive function, and electroencephalographically(EEG) recorded sleep. The study group consisted of 36 women and 35 men.Twenty-two women and sixteen men reported symptoms they specifically relatedto mobile phone use (SG). The rest of the participants reported no mobilephone-related symptoms (NG). Potential participants volunteering for the study were evaluated byphysicians, including some biochemical assessments, to rule out medicalconditions that could interfere with study variables of interest. Onceselected, participants spent three different sessions in the laboratory. Thehabituation session was followed by two subsequent sessions. In thesesubsequent sessions, subjects were either exposed to sham exposure (sham) or884 MHz GSM wireless communication signals for 3 hours (an average of 1.4W/kg including periods of DTX and Non-DTX. Exposure directed to the lefthemisphere). Data was collected before, during and following theexposure/sham sessions. Data collected included self-reported symptoms,including headache, cognitive function, mood, and electroencephalographicrecordings. During actual exposure, as compared to sham exposure, sleep initiatedone hour after exposure was affected. There was a prolonged latency to reachthe first cycle of deep sleep (stage 3). The amount of stage 4 sleep wasalso decreased in exposed subjects. NG subjects reported more headachesduring exposures vs. sham exposure. Neither group (SG and NG) was able todetect the true exposure status more frequently than by chance alone. The study indicates that during laboratory exposure to 884 MHzwireless signals, components of sleep, believed to be important for recoveryfrom daily wear and tear, are adversely affected. Moreover, participantsthat otherwise have no self-reported symptoms related to mobile phone use,appear to have more headaches during actual radiofrequency exposure ascompared to sham exposure. However, subjects were not able to detect thetrue exposure status more often than would have been expected by statisticalchance alone. Additional self-reported findings, biochemical, performance andelectrophysiological data are currently being analyzed. Possible healthimplications from the findings will also be further explored. References: 1. Besset, A., F. Espa, Y. 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Hocking, B., "Preliminary report: symptoms associated with mobilephone use," Occup Med. (Lond), Vol. 48, No. 6, 357-60, 1998. doi:10.1093/occmed/48.6.357 6. Hocking, B., "Symptoms associated with mobile phone use: addendum,"Occup Med (Lond), Vol. 48, No. 7, 472, 1998. doi:10.1093/occmed/48.7.472 7. Koivisto, M., C. Haarala, C. M. Krause, A. Revonsuo, M. Laine, andH. Hamalainen, "GSM phone signal does not produce subjective symptoms,"Bioelectromagnetics, Vol. 22, No. 3, 212-5, 2001. doi:10.1002/bem.41 8. Oftedal, G., J. Wilen, M. Sandstrom, and K. H. Mild, "Symptomsexperienced in connection with mobile phone use," Occup Med (Lond), Vol. 50,No. 4, 237-45, 2000. 9. Rubin, G. J., G. Hahn, B. S. Everitt, A. J. Cleare, and S. Wessely,"Are some people sensitive to mobile phone signals? Within participantsdouble blind randomised provocation study," BMJ, Vol. 332, No. 7546, 886-91,2006. doi:10.1136/bmj.38765.519850.55 © Copyright 2006 PIERS. . 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