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PUBLICATIONS

01/12/2002

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nk@itis.ethz.ch

 

Correction of Numerical Phase Velocity Errors in Nonuniform FDTD Meshes

Andreas Christ, Jürg Fröhlich, and Niels Kuster, IEICE Transactions on Communications, Volume E85-B, Issue 12, pp. 2904–2915, December 2002

 

 
PUBLICATIONS

01/12/2002

Contact
nk@itis.ethz.ch

 

Towards Danger of Mobile Phones in Planes, Trains, Cars and Elevators

Axel Kramer, Jürg Fröhlich and Niels Kuster, Journal of the Physical Society of Japan, Volume 71, Issue 12, page 3100, December 2002

 

 
Electromagnetic Fields, Such as Those from Mobile Phones, Alter Regional Cerebral Blood Flow and Sleep and Waking EEG
01/12/2002

Electromagnetic Fields, Such as Those from Mobile Phones, Alter Regional Cerebral Blood Flow and Sleep and Waking EEG

R. Huber, V. Treyer, A.A. Borbély, J. Schuderer, J.M. Gottselig, H.-P. Landolt, E. Werth, T. Bertholod, N. Kuster, A. Buck, and P. Achermann, Journal of Sleep Research, Volume 11 Issue 4, pp. 289–295, December 2002


Usage of mobile phones is rapidly increasing, but there is limited data on the possible effects of electromagnetic field (EMF) exposure on brain physiology. We investigated the effect of EMF vs. sham control exposure on waking regional cerebral blood flow (rCBF) and on waking and sleep electroencephalogram (EEG) in humans. In Experiment 1, positron emission tomography (PET) scans were taken after unilateral head exposure to 30-min pulse-modulated 900 MHz electromagnetic field (pm-EMF). In Experiment 2, night-time sleep was polysomnographically recorded after EMF exposure. Pulse-modulated EMF exposure increased relative rCBF in the dorsolateral prefrontal cortex ipsilateral to exposure. Also, pm-EMF exposure enhanced EEG power in the alpha frequency range prior to sleep onset and in the spindle frequency range during stage 2 sleep. Exposure to EMF without pulse modulation did not enhance power in the waking or sleep EEG. We previously observed EMF effects on the sleep EEG (A. A. Borbély et al Neurosci. Lett., 1999; R. Huber et al. Neuroreport, 2000), but the basis for these effects was unknown. The present results show for the first time that (1) pm-EMF alters waking rCBF and (2) pulse modulation of EMF is necessary to induce waking and sleep EEG changes. Pulse-modulated EMF exposure may provide a new, non-invasive method for modifying brain function for experimental, diagnostic and therapeutic purposes.