A recent research has unearthed that spending 50 minutes with a cellphone plastered to your ear is enough to change brain cell activity in the part of the brain closest to the antenna.
According to scientists at the National Institute of Health, the study does not settle recurring concerns of a link between cell phones and brain cancer.
According to Dr. Nora Volkow of the NIH whose study was published in the Journal of the American Medical Association, glucose metabolism (a sign of brain activity) increases in the brain in people who were exposed to a cellphone in the area close to the antenna.
The study was meant to examine how the brain reacts to electromagnetic fields caused by wireless phone signals.
Volkow added that she was surprised that the weak electromagnetic radiation from cellphones could affect brain activity but she said the findings do not shed any light on whether cellphones cause cancer. This study does not in any way indicate that. What the study does is to show that the human brain is sensitive to electromagnetic radiation from cellphone exposures.
Use of the devices has increased dramatically since they were introduced in the early-to-mid 1980s, with about 5 billion mobile phones now in use worldwide.
Some studies have linked cellphone exposure to an increased risk of brain cancers but a large study by the World Health Organization was inconclusive.
Volkow’s team studied 47 people who had brain scans while a cellphone was turned on for 50 minutes and another similar group while the phone was turned off.
While there was no overall change in brain metabolism, they found a 7% increase in brain metabolism in the region closest to the cellphone antenna when the phone was on.
Experts stated that the results were intriguing but urged that they be interpreted with caution.
According to Dr. Lennart Hardell of University Hospital, Sweden, although the biological significance, if any, of increased glucose metabolism from acute cellphone exposure is unknown, the results warrant further investigation. Much has to be done to further investigate and understand these effects.
Professor Patrick Haggard of University College London stated that the results were interesting since the study suggests a direct effect of cellphone signals on brain function. He added that much larger fluctuations in brain metabolic rate could occur naturally, such as when a person thinks.

