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.