In February, the National Institutes of Health published a study in the Journal of the American Medical Association that indicated that cell phone radiation boosts brain activity.
Researchers used scans of the brain to measure brain activity in 47 healthy participants when they had cell phones held to their ears in both off and on positions. (When they were on the phones were muted.) The study examined the brain's consumption of glucose to measure brain activity.
A cell phone turned on for more than 50 minutes increased brain activity by about 7 percent in the regions of the brain that were closest to the antenna. This, they concluded, suggests that cell phone use stimulates or excites brain activity.
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But today, WHO issued a report based on the findings of a team of of 31 scientists from 14 countries, including the United States, who considered peer-reviewed studies about the safety of cell phones. The team said that it had found enough evidence from the studies it examined to consider exposure to cell phone radiation as "possibly carcinogenic to humans."
http://news.cnet.com/8301-30686_3-20066842-266.html?tag=mncol;txt Children also may need an extra eye with their phones, Ashton said.
"When you talk about it tochildren, over three quarters of children aged 12 and under in that age group already have use of a cell phone," she said. "Again, they're using it longer, and we don't know what the effects are on the developing brain. We do know their skull is a little bit thinner than the adult skull. There are zero data looking at cell phone use in kids. Those studies will be ongoing."
http://www.cbsnews.com/stories/2011/06/01/earlyshow/health/main20067890.shtml