Despite years of demonisation, mobile phones might actually do us more good than harm. Regular exposure to an electromagnetic field identical to the ones produced by mobile phones seems to improve memory in mice with symptoms of Alzheimer's disease.
Mobile phones have long been vilified by those who claim the gadgets give off radiation that harms the brain. Alzheimer's disease researcher Gary Arendash, a neuroscientist at the University of South Florida in Tampa, was gazing out of his window at people nattering on their phones when it occurred to him the radiation might have a specific, negative effect on the brains of people with Alzheimer's.
To investigate further, he and his colleagues turned to two-month-old mice that had been genetically engineered to develop symptoms similar to those caused by Alzheimer's as they aged, and similarly transgenic four-month-old mice that had already developed the symptoms.
Maze learning
The team placed an antenna that generated electromagnetic waves of the same wavelength as those produced by mobile phones in the centre of a room, and the mice in cages around it. This was designed to give the mice a similar dose of radiation as a person talking on a mobile phone. The group also placed normal, healthy mice in cages in the same room.
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