38 Cell-phone Emissions can change Brain Activity 手机辐射有可能改变大脑活动
So many people use the cell phone so frequently every day.But surprisingly little is certain about the health effects of its use.Manufacturers maintain that cell phones meet government standards for safe radio-frequency radiation emission,but enough studies are beginning to document a possible increase in rare brain tumors,headaches and behavioral disorder in children to cause concern.So far,the evidence isn't conclusive on whether the use of cell phones contributes to any increased risk of cancer.
In a new trial,researchers asked 47 volunteers to participate in a project to measure glucose consumption in the brain by scanning the brain to see how cells use energy.For both 50-minutes scans,the devices were turned off,but for the second scan,the phone on the right ear was switched on and received a recorded-message call,although the volume was muted so the noise wouldn't bias the results.The results of the second scan showed that the regions of the brain nearest to the device had higher rates of glucose consumption than the rest of that brain.
The study shows that cell phones can change brain activity,and provides a whole new avenue for scientific inquiry,though it doesn't say anything about whether cell-phone radiation can cause cancer.
