British review on mobile phones
In its 2000 report, the Independent Expert Group on Mobile Phones recommended that "the issue of possible health effects from mobile phone technology be the subject of a further review in three years time". The UK government asked the Board oh the National Radiological Protection Board (NRPB) to undertake this review and the Board asked its independent Advisory Group on Non-ionising Radiation (AGNIR) to carry it out. The review has now been published and can be read at http://www.nrpb.org/publications/documents_of_nrpb/abstracts/absd14-2.htm
In its Press Release, the NRPB states:
The Swedish Radiation Protection Authority, SSI, has appointed an international independent expert group for electromagnetic fields and health. The task is to follow and evaluate scientific developments and to give advice to SSI. The group has issued its first annual report. Its conclusions were:
The review can be
found at www.ssi.se/english/english_news.html
Braune and colleagues created concern in 1998 when they reported a slight increase in the blood pressure of subjects after exposure to radiofrequency radiation (RFR). The same authors later repeated their study, with one change - they randomized the order of exposure to RFR and to a sham exposure (in the first study all subjects had sham exposure first). In their second study (Braune et al., 2002) there was no significant difference between RFR and sham exposure. It became clear that the minor blood pressure change occurred as a function of time rather than as a result of RFR exposure. Now another group of researchers has confirmed that RFR exposure for 35 minutes had no effect on blood pressure and heart rate when compared with sham exposure.
For more, see "Research - Clinical Experiments - Cardiovascular effects"
Tahvanainen K, Nino J, Halonen P, Kuusela T, et al. (2004): Cellular
phone use does not acutely affect blood pressure or heart rate of humans.
Krause and colleagues have failed in an attempt to replicate the findings from their earlier study in 2000, which showed EEG changes in volunteers exposed to RF radiation. The only differences on this occasion were that the present study was double blind and the phone was attached to the left side of the subject's head, rather than the right side.
Twenty-four healthy volunteers performed an auditory memory task. The EMF was from a 902 MHz phone. The mean percentage of incorrect answers for EMF was significantly increased. This had not been the case in the authors' earlier study. However, all of the eight significant changes in the earlier study were not significant in the present one. Other changes in the present study were not seen in the 2000 study.
For more, see "Research - Clinical - EEG studies".
Krause CM, Haarala C, Sillanmaki L, Koivisto M, et al. (2004): Effects
of electromagnetic field emitted by cellular phones on the EEG during
an auditory memory task: A double blind replication study. Bioelectromagnetics
Cobb and colleagues have attempted to replicate the study by Lai et al. (1994) that showed a working memory deficit in rats exposed to 2450 MHz microwave fields. The authors used procedures that were the same as Lai's, "with the addition of a few minor changes to improve methodology". Cobb and colleagues were unable to replicate Lai's results, and found no evidence that the radiofrequency radiation affected the rats' ability to learn the spatial memory task used in the study.
For more, see "Research - Toxicological experiments - brain function".
Reference: Cobb BL, Jauchem JR, Adair ER (2004): Radial arm maze performance of rats following repeated low level microwave radiation exposure. Bioelectromagnetics 25:49-57.