Haarala C, Takio F, Rintee T, Lainie M, et al. (2007):

Haarala et al. in this paper continue the series of studies they have reported on the effects of RFR on cognitive function (Koivisto 2000a,b; Haarala 2003,2004, 2005). They employed the same cognitive tasks that they used in the other studies. Their subjects were healthy young males. Thirty six subjects participated, but the data from twelve were lost. They were exposed to a 902 MHz electromagnetic field from a signal generator and a linear power amplifier, connected to the antenna of a dummy Nokia phone. In continuous wave condition (CW) 0.25W power was created, while in pulse-modulation (PM) the mean power was 0.25 W. Each subject was exposed at weekly intervals to either the CW or the PM condition, or to sham exposure. The SAR averaged over 10 g of tissue was 0.738 W/kg in the RFR exposures. The exposure was done over each hemisphere in turn. The design was double-blind, and was counterbalanced as far as the exposure condition and the exposed hemisphere were concerned. The subjects performed a series of cognitive function tasks during the exposure. The tasks were performed twice during each session, with the laterality of exposure being changed for the second set of tasks. Each testing session took approximately 90 minutes.

No effects were found between the different RFR exposure conditions, or separate hemisphere exposures.

The authors provide a useful summary of potential explanations for the varied results that have been found in studies of the effects of RFR exposure on cognitive function.

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