Torsten Eggert1, Hans Dorn2, Cornelia Sauter2, Alexander Marasanov2, Marie-Luise Hansen2, Anita Peter2, Gernot Schmid3, Thomas Bolz4, Heidi Danker-Hopfe2. 1. Competence Centre of Sleep Medicine, Charité - University Medicine Berlin, Hindenburgdamm 30, 12200 Berlin, Germany. Electronic address: torsten.eggert@charite.de. 2. Competence Centre of Sleep Medicine, Charité - University Medicine Berlin, Hindenburgdamm 30, 12200 Berlin, Germany. 3. Seibersdorf Laboratories, 2444 Seibersdorf, Austria. 4. Institute of Mobile and Satellite Communication Technology GmbH, Carl-Friedrich-Gauß-Str. 2-4, 47475 Kamp-Lintfort, Germany; RF-Frontend GmbH, Suedstr. 8, 47475 Kamp-Lintfort, Germany.
Abstract
BACKGROUND: Studies have shown that exposure to radiofrequency electromagnetic fields (RF-EMF) in the mobile communication frequency range may induce physiological modifications of both spontaneous as well as event-related human electroencephalogram. So far, there are very few peer-reviewed studies on effects of Terrestrial Trunked Radio (TETRA), which is a digital radio communication standard used by security authorities and organizations in several European countries, on the central nervous system. OBJECTIVES: To analyze the impact of simulated TETRA handset signals at 385 MHz on slow cortical potentials (SCPs). METHODS: 30 young healthy males (25.2±2.7 years) were exposed in a double-blind, counterbalanced, cross-over design to one of three exposure levels (TETRA with 10 g averaged peak spatial SAR: 1.5 W/kg, 6.0 W/kg and sham). Exposure was conducted with a body worn antenna (especially designed for this study), positioned at the left side of the head. Subjects had 9 test sessions (three per exposure condition) in which three SCPs were assessed: SCP related to a clock monitoring task (CMT), Contingent negative variation (CNV) and Bereitschaftspotential (BP). RESULTS: Neither behavioral measures nor the electrophysiological activity was significantly affected by exposure in the three investigated SCP paradigms. Independent of exposure, significant amplitude differences between scalp regions could be observed for the CMT-related SCP and for the CNV. CONCLUSIONS: The present results reveal no evidence of RF-EMF exposure-dependent brain activity modifications investigated at the behavioral and the physiological level.
BACKGROUND: Studies have shown that exposure to radiofrequency electromagnetic fields (RF-EMF) in the mobile communication frequency range may induce physiological modifications of both spontaneous as well as event-related human electroencephalogram. So far, there are very few peer-reviewed studies on effects of Terrestrial Trunked Radio (TETRA), which is a digital radio communication standard used by security authorities and organizations in several European countries, on the central nervous system. OBJECTIVES: To analyze the impact of simulated TETRA handset signals at 385 MHz on slow cortical potentials (SCPs). METHODS: 30 young healthy males (25.2±2.7 years) were exposed in a double-blind, counterbalanced, cross-over design to one of three exposure levels (TETRA with 10 g averaged peak spatial SAR: 1.5 W/kg, 6.0 W/kg and sham). Exposure was conducted with a body worn antenna (especially designed for this study), positioned at the left side of the head. Subjects had 9 test sessions (three per exposure condition) in which three SCPs were assessed: SCP related to a clock monitoring task (CMT), Contingent negative variation (CNV) and Bereitschaftspotential (BP). RESULTS: Neither behavioral measures nor the electrophysiological activity was significantly affected by exposure in the three investigated SCP paradigms. Independent of exposure, significant amplitude differences between scalp regions could be observed for the CMT-related SCP and for the CNV. CONCLUSIONS: The present results reveal no evidence of RF-EMF exposure-dependent brain activity modifications investigated at the behavioral and the physiological level.
Authors: Adrian P Burgess; Nathalie C Fouquet; Stefano Seri; Malcolm B Hawken; Andrew Heard; David Neasham; Mark P Little; Paul Elliott Journal: Environ Res Date: 2016-07-13 Impact factor: 6.498
Authors: He Gao; Maria Aresu; Anne-Claire Vergnaud; Dennis McRobie; Jeanette Spear; Andy Heard; Håvard Wahl Kongsgård; Deepa Singh; David C Muller; Paul Elliott Journal: Br J Cancer Date: 2018-12-26 Impact factor: 7.640