Electromagnetic fields, such as those from mobile phones, alter regional cerebral blood flow and sleep and waking EEG
| Autor: | Hans-Peter Landolt, Jürgen Schuderer, Alexander A. Borbély, Peter Achermann, Valerie Treyer, Thomas Berthold, Alfred Buck, Julie M. Gottselig, Esther Werth, Niels Kuster, Reto Huber |
|---|---|
| Přispěvatelé: | University of Zurich, Achermann, P |
| Rok vydání: | 2002 |
| Předmět: |
Adult
Male 2805 Cognitive Neuroscience animal structures Cognitive Neuroscience 10050 Institute of Pharmacology and Toxicology 610 Medicine & health Electroencephalography Behavioral Neuroscience Electromagnetic Fields 2802 Behavioral Neuroscience Sleep electroencephalogram medicine Humans Wakefulness Brain function medicine.diagnostic_test Brain General Medicine Sleep in non-human animals Dorsolateral prefrontal cortex medicine.anatomical_structure Cerebral blood flow Cerebrovascular Circulation 570 Life sciences biology Sleep Stages Sleep onset Psychology Neuroscience Sleep eeg Cell Phone Tomography Emission-Computed |
| Zdroj: | Journal of Sleep Research. 11:289-295 |
| ISSN: | 1365-2869 0962-1105 |
| DOI: | 10.1046/j.1365-2869.2002.00314.x |
| Popis: | 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, R. Huber, T. Graf, B. Fuchs, E. Gallmann and P. Achermann. Neurosci. Lett., 1999, 275: 207-210; R. Huber, T. Graf, K. A. Cote, L. Wittmann, E. Gallmann, D. Matter, J. Schuderer, N. Kuster, A. A. Borbély, and P. Achermann. Neuroreport, 2000, 11: 3321-3325), 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text