THURSDAY, March 15 (HealthDay News) — In experiments involving
mice, fetal exposure to cellphone radiation appeared linked to symptoms in
offspring that resemble attention-deficit hyperactivity disorder (ADHD) in
human children, Yale researchers report.
Moreover, these problems with attention, hyperactivity and memory
continued when the mice became adults and were worse the longer they were
exposed to cellphone radiation in the womb, the researchers said.
“The hypothesis was that the developing brain might be more
susceptible to these types of insults,” said senior researcher Dr. Hugh
Taylor, a professor and chief of the division of reproductive
endocrinology and infertility in the department of obstetrics, gynecology
reproductive sciences.
“We found they seem to have behavioral changes like ADHD. I don’t want
to sensationalize this — mice don’t have ADHD — but they had problems
with memory, impulsiveness and hyperactivity,” he explained.
There have been studies in humans that correlate the amount of time
pregnant women spend on a cellphone with their children’s ADHD, Taylor
added.
“But, these studies were largely dismissed because there are many other
things that correlate with cellphone use,” he said. “This study is the
first one that shows that there is a cause-and effect-relationship,” at
least in rodents, he said.
However, while studies involving animals can be useful, experts note
that they frequently fail to produce similar results in humans.
The findings cannot therefore be directly extrapolated to women, but
they do indicate that cellphone exposure during pregnancy may have
effects, Taylor said. “We need to start thinking about how much is safe
in humans and limit that exposure,” he said.
“I think we need to be careful about radio-frequency exposures in
pregnant women,” he said. “The radiation may have consequences for the
developing brain.”
The report was published in the March 15 issue of Scientific
Reports.
During 19 days of pregnancy, Taylor’s team exposed mice to radiation
from a turned on — but muted and silenced — cellphone placed above the
cage.
In another group, mice were kept under the same conditions but with a
deactivated phone.
The researcher measured electrical activity in the brains of adult mice
that were exposed to radiation as fetuses. In addition, they conducted
psychological and behavioral tests.
They found the mice exposed to radiation tended to be more hyperactive
and had increased anxiety and reduced memory.
The explanation for this finding isn’t clear, Taylor said. It might be
due to heating of the developing brain cells or electrical changes in
these cells, he theorized.
Taylor noted that you don’t have to be talking on the cell phone to be
exposed to radio-frequency radiation: “There is always radiation
transmitted as long as the cellphone is on,” he said.
Speaking for the cellphone industry, John Walls, a spokesman for the
CTIA-The Wireless Association, said that “the peer-reviewed scientific
evidence has overwhelmingly indicated that wireless devices, within the
limits established by the FCC, do not pose a public health risk or cause
any adverse health effects.”
However, some doctors believe that more study might be warranted.
Dr. Francene Gallousis, a perinatologist at Northern Westchester
Hospital in Mt. Pisco, N.Y., said that “I think there is something to all
this, but I don’t know exactly what it is or how concerned we should be
right now.”
“It can’t be ignored — it needs to be looked into,” she added.
Gallousis did suggest that to be safe, women should limit their
exposure to cellphone radiation. She advised them to try to limit the time
talking on the cellphone and to not leave it on if it doesn’t have to be.
Dr. Nagy Elsayyad, an assistant professor in the department of
radiation oncology at the University of Miami Sylvester Comprehensive
Cancer Center, has looked at cellphone radiation and the risk for cancer.
He also believes that it’s still too early to tell if the effects seen in
mice translate to humans.
“These finding are interesting, but very preliminary,” he said. “This
is hypothesis-generating research, so it’s too early to jump to any
conclusions, but it’s worth putting research money into.”
More information
For more on ADHD, visit the U.S.
Centers for Disease Control and Prevention.
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