Author/Authors :
Rafati، A نويسنده Physiology Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Ira , , Rahimi، S نويسنده Medical Physics and Medical Engineering Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran , , Talebi، A نويسنده Medical Physics and Medical Engineering Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran , , Soleimani، A نويسنده Department of Epidemiology, school of health, Tabriz university of medical science, Tabriz, Iran , , Haghani، M نويسنده Ionizing and Non-ionizing Radiation Protection Research Center (INIRPRC), Shiraz University of Medical Sciences, Shiraz, Iran , , Mortazavi، S M J نويسنده Medical Physics and Medical Engineering Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran ,
Abstract :
Introduction: The rapid growth of wireless communication technologies has
caused public concerns regarding the biological effects of electromagnetic radiations
on human health. Some early reports indicated a wide variety of non-thermal effects
of electromagnetic radiation on amphibians such as the alterations of the pattern of
muscle extractions. This study is aimed at investigating the effects of exposure to radiofrequency (RF) radiation emitted from mobile phone jammers on the pulse height
of contractions, the time interval between two subsequent contractions and the latency
period of frog’s isolated gastrocnemius muscle after stimulation with single square
pulses of 1V (1 Hz).
Materials and Methods: Frogs were kept in plastic containers in a room. Animals in the jammer group were exposed to radiofrequency (RF) radiation emitted from
a common Jammer at a distance of 1m from the jammer’s antenna for 2 hours while
the control frogs were only sham exposed. Then animals were sacrifced and isolated
gastrocnemius muscles were exposed to on/off jammer radiation for 3 subsequent 10
minute intervals. Isolated gastrocnemius muscles were attached to the force transducer
with a string. Using a PowerLab device (26-T), the pattern of muscular contractions
was monitored after applying single square pulses of 1V (1 Hz) as stimuli.
Results: The fndings of this study showed that the pulse height of muscle contractions could not be affected by the exposure to electromagnetic felds. However,
the latency period was effectively altered in RF-exposed samples. However, none of
the experiments could show an alteration in the time interval between two subsequent
contractions after exposure to electromagnetic felds.
Conclusion: These fndings support early reports which indicated a wide variety
of non-thermal effects of electromagnetic radiation on amphibians including the effects on the pattern of muscle extractions.
