Motorola st7868w Manual page 137

causing agents increase risk with increased exposure. An ongoing
study of brain cancers by the National Cancer Institute is expected to
bear on the accuracy and repeatability of these results.
2. Researchers conducted a large battery of laboratory tests to assess the
effects of exposure to mobile phone RF on genetic material. These
included tests for several kinds of abnormalities, including mutations,
chromosomal aberrations, DNA strand breaks, and structural changes
in the genetic material of blood cells called lymphocytes. None of the
tests showed any effect of the RF except for the micronucleus assay,
which detects structural effects on the genetic material. The cells in this
assay showed changes after exposure to simulated cell phone
radiation, but only after 24 hours of exposure. It is possible that
exposing the test cells to radiation for this long resulted in heating.
Since this assay is known to be sensitive to heating, heat alone could
have caused the abnormalities to occur. The data already in the
literature on the response of the micronucleus assay to RF are
conflicting. Thus, follow-up research is necessary.
1.
FDA is currently working with government, industry, and academic
groups to ensure the proper follow-up to these industry-funded
research findings. Collaboration with the Cellular
Telecommunications Industry Association (CTIA) in particular is
expected to lead to FDA providing research recommendations and
scientific oversight of new CTIA-funded research based on such
recommendations.
Two other studies of interest have been reported
recently in the literature:
1.
Two groups of 18 people were exposed to simulated mobile phone
signals under laboratory conditions while they performed cognitive
function tests. There were no changes in the subjects' ability to recall
words, numbers, or pictures, or in their spatial memory, but they were
able to make choices more quickly in one visual test when they were
exposed to simulated mobile phone signals. This was the only change
noted among more than 20 variables compared.
2.
In a study of 209 brain tumor cases and 425 matched controls, there
was no increased risk of brain tumors associated with mobile phone
use. When tumors did exist in certain locations, however, they were
more likely to be on the side of the head where the mobile phone was
used. Because this occurred in only a small number of cases, the
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