ID Number		265
Study Type		In Vivo
Model		900 MHz (GSM), 2450 MHz (CW, AM-16 Hz) exposure to rats and analysis of brain electrical activity, cerebral circulation, and learning behavior
Details		Wistar rats (female) were exposed to either 2450 MHz (CW) microwaves for 10 minutes at SARs in the brain of 0.8, 8.3, and 25.1 W/kg of 0.2 (whole body average 2.3, and 6.9 W/kg) using a standard horn antenna, or 4 GHz (AM – 16 Hz) microwaves for up to 30 minutes at SARs in the brain of 8.4, 16.8, and 42 W/kg using a waveguide. The rats were previously implanted encephalographic (EEG) or rheoencephalographic (REG) electrodes. Exposure at high dose levels (which elevated brain temperature) were also reported to increase overall EEG activity by 30-50% of controls. Exposures termed "quasi nonthermal" (i.e., they did not significantly increase brain temperature) were reported to increase REG activity without affecting EEG activity. Most importantly, PW microwaves vs CW microwaves had differential effects on increasing alpha and beta wave activity and increasing REG. In subsequent studies, rats were exposed to 900 MHz (GSM) for 30 minutes at a maximal SAR in the brain of 1.32 W/kg. Exposure resulted in a decreased response latency and task accuracy and enhanced cellular excitation recordings of firing rates from single neurons. The authors suggest GSM exposure may elicit short term alterations in spontaneous brain activity and impair cognitive and memory function.
Findings		Effects
Status		Completed With Publication
Principal Investigator		Res. Inst. for Radiobiol & Radiohyg, Hungary - thuroczy@hp.osski.hu
Funding Agency		Ministry of Welfare, Hungary
Country		HUNGARY
References		Thuroczy, G et al. Rev. Environ. Health, (1994) 10:135-148
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