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Mobile phone derived electromagnetic fields can disturb learning
Date:6/30/2011

ived from non-thermal HEFs or from stress, like it can be induced by handling of the experimental animal (e.g. placing a rat into an unknown environment).

Stress or non-thermal EMF effect Scientists line out for the first time

To investigate this question, a new study was performed by scientists of the Department of Neuroanatomy and Molecular Brain Research (Professor Dr. med. Rolf Dermietzel) in cooperation with the Chair of Electromagnetic Theory of the University of Wuppertal. For the experiment, rats were placed into differently powered non-thermal HEFs in the UMTS operating range. Synaptic learning and memory formation were analysed by electrophysiological methods. Furthermore, all animals were tested for stress hormone release immediately following the HEF exposure.

Mobile phone use seems to be harmless critical values for occupational use have to be controlled precisely

The results: Although there was daily training and effortless contact to the exposure environment, increases in blood derived stress hormone levels could be detected for all exposed groups. The stress clearly influences learning and memory formation on the synaptic level in the rat brain. High powered EMFs (SAR 10 W/kg) also have a significant effect on learning and memory formation. In contrast to this, weak EMFs (SAR 0 and 2 W/kg) lead to no detectable changes or impairments. "These results cannot directly be transferred to humans", says Nora Prochnow. "But in the animal model, it can be demonstrated that neuronal mechanisms of synaptic learning can serve as a target for high powered EMFs". However, there is no need for serious concerns: humans are not exposed to this type of high powered EMFs during daily mobile phone use. Nevertheless, the matter has to be regarded differently in special occupational situations, for instance during the use of body worn antenna systems as it is common for security services or military purposes. Here, critica
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Contact: Dr. Nora Prochnow
nora.prochnow@rub.de
49-234-322-4406
Ruhr-University Bochum
Source:Eurekalert

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