According to a preliminary study in the Journal of the American Medical Association – “Effects of Cell Phone Radiofrequency Signal Exposure on Brain Glucose Metabolism” (Volkow et al. 2011) – the radio frequency emissions from cell phones can cause detectable changes in the metabolism of a specific brain region.
In healthy participants and compared with no exposure, 50-minute cell phone exposure was associated with increased brain glucose metabolism in the region closest to the antenna. This finding is of unknown clinical significance.
While there has been a great deal of speculation in the media regarding the mechanism of this effect, we need to dedicated some thought to whether there is actually an effect that requires explanation.
The Finch and Pea 