ID Number		138
Study Type		Human / Provocation
Model		916 MHz (GSM) exposure to humans and analysis of evoked potentials
Details		Human subjects (n=16) were exposed to 916.2 MHz GSM at a peak power of 2.8 watts by fitting them with a cell phone strapped over the left temporal / tempo-parietal head region. Peak SARs in the head were calculated at ~1.42 W/kg. During exosure, subjects were monitored for slow (preparatory) brain potentials following a cue to perform a finger movement or a complex visual monitoring task. Subject performance was uneffected by RF, although slow potentials in the alpha and beta bands (10-30 Hz) were decreased in the temperal-parietal-occipital and central regions in the opposite (right) hemisphere as exposure. These results were confirmed in additional studies reported at EBEA 2001 in Helsinki, Finland. The authors concluded that GSM exposure may alter preparatory brain activity (information processing). In a second study, human subjects (n=20-all right handed males, mean age 25 yrs) were exposed and monitored as above following a cue to perform various tasks from a computer screen. Again (as in the above studies), performances themselves in the tests were not affected by RF exposure. As before, exposure resulted in decreases in slow brain potentials during complex visual motor tasks, but not single finger movement (Bereitschaftspotential task) or a 2-stimulus task designed to elicit a contingent negative variation (CNV).
Findings		Effects
Status		Completed With Publication
Principal Investigator		Fed. Inst. Occup. Safety & Health, FRG
Funding Agency		IOSH, Germany
Country		GERMANY
References		Freude, G et al. Eur. J. Appl. Physiol., (2000) 81:18-27 Freude, G et al. Bioelectromagnetics, (1998) 19:384-387
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