Study Says Brain Waves Affected By Phone Use, Draws No Conclusions
RCR Wireless News
December 10, 2002
A newly published study said GSM 900 MHz mobile-phone
signals cause changes to brain activity that linger after exposure to
handset radiation, an effect observed in a sleep study that scientists said
was unlikely the result of thermal effects on the brain.
The study, led by Dr. Peter Achermann at the University of Zurich’s
Institute of Pharmacology and Toxicology and published in the Journal of
Sleep Research, revealed blood flow increased in areas of the brain on the
side nearest the phone and the effect lasted for more than half an hour
Scientists also discovered that the brain’s electrical activity—brain
waves—was not only affected immediately after the exposure, but also lasted
through much of the next night’s sleep.
The scientists said the cause of brain changes seemed to be the pulse
modulation of the phone signal, not its carrier frequency.
However, Achermann cautioned that “it would be premature to draw conclusions
about health consequences of these findings. Fields such as those emitted by
mobile phones might even be used for diagnostic or therapeutic purposes.”