Fritzer G, Goder R, Friege L, Wachter J et al. (2007):

The authors recruited 20 healthy young adult males for this study. The subjects were randomized into 2 groups of 10 each. Each subject spent 8 consecutive nights in the sleep laboratory, and was blind to the exposure conditions. One group was exposed to 900 MHz RFR from "lights out" (between 10pm and 12 pm) and "lights on", at 6.45 am, from the 3rd to the 8th night inclusive. Recordings of EEG, electrooculogram (EOG), and electromyogram (EMG) were done on the 2nd night as a baseline, and repeated on the next night (the first of exposure) and on the last night of exposure. Neuropsychological tests were done pre- and post-sleep on the same nights as the other tests. The maximum SAR to the head was approximately 1 W/kg.

There were no significant effects on sleep parameters, or on neuropsychological testing in the exposed subjects, as compared to the controls.

This appears to be the first study on brain function that investigated "long-term" effects.

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