Cell phones and their possible effects on the brain have been questioned by the scientific community for years. The bulk of research indicates that cell phone use is likely not linked to brain cancer, but the answer really is inconclusive at this point. New research suggests that electromagnetic waves emitted from cellular phones, do excite the cortex of the brain closest to placement of the device. A study published in the Annals of Neurology in June of 2006 showed that cell phones enhanced cortical activity similarly to the way caffeine acts on the brain, resulting in a temporary enhanced ability to respond to a stimulus.
Researchers conducted a double-blind controlled experiment where 15 men were fitted with a helmet, placing a cell phone against the head. In one session, the GSM 900 phone was turned on for 45 minutes, while in another session the phone remained off. The results showed a statistically significant increase in cortical excitability after cellular phone exposure, lasting about an hour. Authorities in the field are uncertain whether this is a positive or negative effect, and suggest it may depend on any pre-existing condition an individual may have. For example, patients with epilepsy may have deleterious effects due to the increase in excitability that already exists, possibly triggering seizures.
The authors concluded, "Further studies are needed to better circumstantiate these conditions and to provide safe rules for the use of this increasingly more widespread device." Again, the answers on cell phone safety are still inconclusive.
Posted by Dr. Jennifer Stagg on September 3, 2006 07:55 AM
