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-
Exposure
to high frequency electromagnetic fields, biological effects and health
consequences (100 kHz-300 GHz)
(PDF Âü°í)
(https://www.emf.ethz.ch/archive/var/ICNIRP_effekte_RFReview.pdf)
II.6. SUMMARY AND CONCLUSIONS
II.6.1. Summary
The mechanisms by which RF exposure heats biological
tissue are well understood, and the most consistent effects of acute RF exposure on human subjects
are the thermoregulatory responses of the cardiovascular system to RF-induced heating, increasing
heat loss from the skin through increased skin blood flow and evaporative heat loss from sweat. Children
are known to thermoregulate as well as adults in response to exercise and/or hot environments, but may
be more vulnerable to dehydration.
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Similar cardiovascular responses to RF-induced heating
such as increased skin blood flow occur in laboratory animals. However, animals are less effective
at dissipating excess heat than humans, being in general less able to increase skin blood flow and sweat
although heat loss can also occur via other mechanisms such as panting. The evidence from volunteer
studies suggest that cognitive function can be adversely affected by whole-body heat stress, resulting
in increased levels of unsafe behavior and reduced task performance, but this has not yet been explored
using RF-exposed subjects.
However, laboratory animals show a consistent reduction in the performance of
learned behaviors when RF exposure increases core body temperatures by about 1¡ÆC or more. Similar
RF-induced rises in body temperature also result in significantly enhanced plasma corticosterone or cortisol
levels in rodents and primates respectively and transient changes in immune function and hematology,
generally consistent with the acute responses to non-specific stressors. Again, these thermal effects have
not been systematically explored in RF volunteer studies.
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