Mobile phone use may have an effect on brain activity, but health consequences remain unknown


Dr Nora D Volkow of the National Institutes of Health in Bethesda, MD, USA and colleagues carried out a study to see if using a mobile phone affected brain glucose metabolism, a marker of activity, in the human brain. The study had 47 participants who were required to place their mobiles on their right and left ears, and brain imaging was performed with positron emission tomography (PET) with (18F) fluorodeoxyglucose injection (to measure brain glucose). In one test the mobile was switched on, and in the other it was switched off. They found that metabolism in the brain region closest to the antenna was significantly greater when the mobile phone was on, as opposed to when it was off.

However this research has no bearing on current concerns as to whether exposure to radiofrequency-modulated electromagnetic fields (RF-EMFs) may induce brain cancer, and further studies are needed to assess whether the effects of increased brain activity might have potential long-term harmful consequences.

Source: The Journal of the American Medical Association

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First Published in Febuary 2011

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