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

High frequency non-ionizing radiation, emitted by mobile phones, is redundantly matter of discussions. The effects of high frequency electromagnetic fields (HEFs) derived from mobile phones have been discussed since the 1950's. Neuroscientists from Bochum were now able to elucidate this question. For the first time, they provide proof that extremely high-powered electromagnetic fields (EMFs) indeed influence learning processes on the synaptic level within the brain, independent from other factors like stress. "For this effect, very high values are necessary. These do not occur during the daily use of mobile phones", explains Dr. Nora Prochnow (Medical Faculty of the RUB).

Mobile phone derived non-ionizing radiation can produce heat

HEFs are not only used in mobile phones, but also in a variety of other communication systems like radio, television or cordless telephone sets. Mobile phones of the so called third generation utilize the UMTS technology (Universal Mobile Communication System) with a frequency of 1200 MHz and a relatively weak operating range (3.8-4.8 V/m). With increasing power, EMFs are able to elicit local warming of body tissues, being also described as a "thermal effect". Reportedly, mobile phones can cause local warming of the brain by less than 0.1C. The effect on function and structure of the brain during long term use of mobile phones (e.g. > 30 min) remains unexplained until now.

and might influence cellular activity

Furthermore, statements regarding the non-thermal effects of mobile phone emitted EMFs are unclear and contradictive. These comprise for instance an increase in permeability and fluidity of cellular membranes, which can be implicated in changes in ion-channel integration and metabolism, even without a detectable change in temperature. This may impair synaptic learning processes in the brain. Until now, experiments could only insufficiently enlighten, whether these effects are derived 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, critical levels for occupational exposure may be reached more easily and have to be controlled carefully.


'/>"/>

Contact: Dr. Nora Prochnow
nora.prochnow@rub.de
49-234-322-4406
Ruhr-University Bochum
Source:Eurekalert

Related medicine news :

1. Children experience wrist and finger pain when using gaming devices and mobile phones over time
2. Study: Surge in obesity correlates with increased automobile usage
3. Cedars-Sinais mobile medical clinics receive $500,000 grant from California Community Foundation
4. New mobile app gives a voice to those with communications challenges
5. $3.4 million grant awarded to help older people stay mobile
6. Cedars-Sinais mobile medical clinics receive grant from George Hoag Family Foundation
7. ASN launches mobile edition of news magazine, ASN Kidney News
8. Blood pressure, glaucoma links in migraine patients; eye care goes digital and mobile
9. Mobile obstetrics project improves health of mothers in Eastern Burma
10. IVR Technology Group Announces MobileMarketing123.com
11. CellTrak Mobile Technology Improves Client Care in Vancouver for the Community Home Support Services Association
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/11/2016)... , ... February 11, 2016 , ... ... for nominations seeking candidates for the Board of Commissioners. Individuals interested in volunteer ... and experience with diversity of clinical practice settings and across allied health to ...
(Date:2/11/2016)... ... February 11, 2016 , ... Greenfield Insurance Group in Orange ... assist the people of their local community. The agency pledges to select a ... Their hope is to bring awareness to important local causes with fundraising and ...
(Date:2/11/2016)... ... 11, 2016 , ... Duterte Insurance Group, serving the families ... new charity campaign to raise funds for Ronald McDonald House Charities. On behalf ... . , Ronald McDonald House (RMH) is an internationally renowned nonprofit organization which ...
(Date:2/11/2016)... ... February 11, 2016 , ... Be Well Medical Group (Be ... of Old Town at 108 South Columbus St, Suite 201, Alexandria, VA. Be Well ... medical care in the convenience of their homes, offices or at the practices’ local ...
(Date:2/11/2016)... CO. (PRWEB) , ... February 11, 2016 , ... ... people have become more actively engaged in health and wellness best practices in ... importance of riding this trend. February is American Heart Month, which acts as ...
Breaking Medicine News(10 mins):
(Date:2/11/2016)... -- AfterPill.com is reporting that this week,s Centers for Disease ... who are at risk of unintended pregnancy impacts 43 ... the risks of unprotected sex in particular.  ... the Guttmacher Institute, there are 43 million women in ... have sex without the intention of becoming pregnant.  Despite ...
(Date:2/11/2016)... 11, 2016  Proliant Biologicals is proud to announce ... (BSA) manufacturing facility.  The facility is located on the ... in Feilding. Boone , Iowa.  ... duplicate the systems in the U.S. facility, with critical ... U.S. installations.  --> Boone ...
(Date:2/11/2016)... , Feb. 11, 2016 Brain Cancer ... treatment method at West Cancer Center . ... fields to inhibit cancer cell replication causing death of ... than a decade to show a significant extension in ... (GBM) patients. Currently, West Cancer Center is the only ...
Breaking Medicine Technology: