Sienkiewicz Z, Blackwell RP, Haylock RGE, Saunders RD, et al. (2000)
The authors tested the effect of exposure of mice to RF radiation on the performance of a learned behavioural task in a radial arm maze. They used a pulsed 900 MHz microwave signal that corresponded to the GSM signature. The whole-body SAR was 0.05 W/kg. The animals were tested when they were 12 weeks old. They were exposed to the RF radiation - or sham-exposed - for 45 minutes on each of the 10 days of the tests. One group of animals was tested in the maze immediately after the exposure. A second group was tested 15 minutes after the end of the exposure, and a third 30 minutes after the exposure. The aim of the experiment was to determine how often the mice entered one of the eight arms of the maze that they had already entered. A food reward was placed in each arm.
No significant differences were seen in choice accuracy or in total times to complete the task. All groups of animals showed increases in performance with testing.
The authors point out several differences between their study and that of Lai and colleagues (1994). There were differences in species, the frequency of the microwaves, the pulse width, the type of exposure system, the maze design, and, most importantly, the SAR. The SAR in Lai's study was 0.6 W/kg. Sienkiewicz et al. indicate that a typical GSM handset would produce a maximum time-averaged SAR of about 0.5 W/kg in the head. The authors state that they plan to use other SARs in further experiments.