Result: The five shields did virtually nothing to reduce the brain's exposure to cell phone radiation, says Donald Mays, the institute's technical director.

FORBES: Shield sham

The findings of the study, which examined the subjects during just one 50-minute exposure, raise a key question, the researchers said: What, if any, are the long-term consequences of repeated increased brain activity due to exposure to cell phone radiation?

CNN: Cell phone exposure increases brain cell activity

"If someone already has brain damage and then stimulates it with electromagnetic exposure from a cell phone, it could trigger something dangerous, " Volkow said.

CNN: Cell phone exposure increases brain cell activity

While the world waits for more research to be conducted, consumers can take steps to limit cell phone radiation exposure by using the speakerphone or a wired earpiece to make calls.

CNN: Cell phone exposure increases brain cell activity

Result: All five shields did virtually nothing to lower a cell phone's radiation exposure to the brain, says Donald Mays, the institute's technical director.

FORBES: Shield Sham

Reinares said French security services had asked their Spanish counterparts not to share intelligence on the suspected cell with the Spanish judiciary, fearing that open exposure of such information in court -- as required by Spanish law -- could blow the whole operation.

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So users can avoid using their cell phones in elevators, buildings and rural areas if they want to reduce their exposure, experts say.

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Researchers are discovering that daily exposure to computers, smart phones, video games, Internet search engines, etc. stimulates brain cell alteration and neurotransmitter release, gradually strengthening new neural pathways while weakening old ones.

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Similarly, Mary Helen Barcellos-Hoff, a professor of radiation oncology and cell biology at NYU and her team lost mouse populations involved in studies of how radiation exposure increases cancer risk as well as how radiation can be targeted to treat tumors.

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The proliferation of cell phones, iPods and Facebook brings a complicated challenge for parents, teachers and students: The constant exposure to technology and the Web amplifies opportunities for children to bully each other online.

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