No effects of short-term exposure to mobile phone electromagnetic fields on human cognitive performance: A meta-analysis
ABSTRACT During recent years, a large number of studies on the effects of electromagnetic fields emitted by cellular mobile phones on human cognitive performance have been carried out. However, the results have been ambiguous. We carried out the current meta-analysis in order to investigate the impact of electromagnetic fields emitted by mobile phones on human cognition. Seventeen studies were included in the meta-analysis as they fulfill several requirements such as single- or double-blind experimental study design, and documentation of means and standard deviations of dependent variables. The meta-analysis was carried out as a group comparison between exposed and non-exposed subjects. No significant effects of electromagnetic fields emitted by Global System for Mobile Communications (GSM) and Universal Mobile Telecommunications System (UMTS) mobile phones were found. Cognitive abilities seem to be neither impaired nor facilitated. Results of the meta-analysis suggest that a substantial short-term impact of high frequency electromagnetic fields emitted by mobile phones on cognitive performance can essentially be ruled out. Bioelectromagnetics. © 2011 Wiley-Liss, Inc.
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ABSTRACT: Concerns have developed for the possible negative health effects of radiofrequency electromagnetic field (RF-EMF) exposure to children's brains. The purpose of this longitudinal study was to investigate the association between mobile phone use and symptoms of Attention Deficit Hyperactivity Disorder (ADHD) considering the modifying effect of lead exposure. A total of 2,422 children at 27 elementary schools in 10 Korean cities were examined and followed up 2 years later. Parents or guardians were administered a questionnaire including the Korean version of the ADHD rating scale and questions about mobile phone use, as well as socio-demographic factors. The ADHD symptom risk for mobile phone use was estimated at two time points using logistic regression and combined over 2 years using the generalized estimating equation model with repeatedly measured variables of mobile phone use, blood lead, and ADHD symptoms, adjusted for covariates. The ADHD symptom risk associated with mobile phone use for voice calls but the association was limited to children exposed to relatively high lead. The results suggest that simultaneous exposure to lead and RF from mobile phone use was associated with increased ADHD symptom risk, although possible reverse causality could not be ruled out.PLoS ONE 03/2013; 8(3):e59742. DOI:10.1371/journal.pone.0059742 · 3.53 Impact Factor
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ABSTRACT: Within the past decade, a quiet revolution has occurred in consumer electronics, with a massive shift toward wireless connectivity in household devices. While these open up new possibilities for consumers, the possible harms associated with wireless and Internet technologies-for example, privacy and security issues-have prompted widespread concern among consumers and experts alike. Also, in the public arena, there has been widespread concern about possible health effects of exposure to radio-frequency (RF) energy emitted by wireless-enabled devices, in particular around use of Wi-Fi in schools and wireless-enabled electric utility meters, known as “smartmeters,” in residences. While the RF exposures from such devices are far below U.S. and international safety limits, some aspects of the exposures (their involuntary nature or perhaps the novelty of the technologies) have been particularly troubling to the public. Consequently, political leaders have called for studies on possible health effects of wireless technology.IEEE Microwave Magazine 03/2013; 14(2):73-84. DOI:10.1109/MMM.2012.2234641 · 1.67 Impact Factor
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ABSTRACT: Imaging techniques give a fundamental support to medical diagnostics during the pathology discovery as well as for the characterization of bio-medical structures. The imaging methods involve electromagnetic waves in a frequency range that spans from some Hz to GHz and over. Most of these methods involves ionizing waves and scanning of wide human body area even if only a focused inspection is needed. In this paper, a numerical method to evaluate the shape of microstructures for application in the medical field, with a very low invasiveness for the human body, is proposed. In particular, the tooth’s root canal is considered. In fact, this is one of the hot topic in the endodontic procedures where rotary instruments are widely used. These instruments are subjected to sudden mechanical damage during the surgical process, due to cyclic fatigue directly related to the canal geometrical characteristics. In order to develop improved endodontic procedure so that instrument breakage probability and canal milling precision are optimized, preliminary canal root reconstruction techniques have to be implemented. These techniques are usually based on invasive X-ray imaging. Thus, a low invasive, easy to use imaging technique that can be applied many times on the patient is of great interest. To this aim, a method based on a flexible thinwire antenna radiating non ionizing VHF waves, is proposed. By measuring the spatial magnetic field distribution in the neighboring, it is possible to reconstruct the microstructures image by estimating the shape of the antenna against a sensors panel. The mathematical model is strictly non-linear and the inverse problem described above is solved numerically; first simulation results are presented in order to show the validity and the robustness of the proposed approach.Journal of Computational and Applied Mathematics 07/2013; 259. DOI:10.1016/j.cam.2013.07.020 · 1.08 Impact Factor