Why Unprotected Cellular Phone Use ''Excites'' Your Brain
July 13, 2006
Electromagnetic fields emitted from cell phones excite the brain cortex nearest to the phone, Italian researchers found. It is not known whether this effect is harmful to the brain.
The researchers used Transcranial Magnetic Stimulation (TMS) to monitor brain function of 15 young men using a GSM 900 cell phone for 45 minutes. Twelve of the volunteers showed excitability in the motor cortex cells -- the outer layer of the brain -- adjacent to the cell phone. Their brains returned to normal about an hour after cell phone use was stopped.
More than 500 million people use a cell phone that emits electromagnetic fields, called a Global System for Mobile Communications (GSM) radio phone.
Previous studies on the effects of cell phones on the brain, and whether there is a link to cancer, have had varying results. The researchers said their study did not show that using a cell phone was harmful, although people with certain conditions linked to brain cell excitability, such as epilepsy, may be affected.