Effects of Pulsed High-Frequency Electromagnetic Fields on the Neuroendocrine System

Mann, Klaus; Wagner, Peter D.; Brunn, Georg; Hassan, Feisal; Hiemke, Christoph; Röschke, Joachim

doi:10.1159/000054308

Cited by 72 publications

(49 citation statements)

References 19 publications

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“…Long-term magnetotherapy influences the circadian profile of cortisol secretion, a decrease of cortisol concentration after 3 weeks of applications at 4:00 p.m. was observed [33]. Mann et al [34] reports that in humans exposed to high frequency magnetic field, 900 Hz, pulsating at 217 Hz (the frequency of the field similar to magnetostimulation), there appears to be a slight increase in the concentration of cortisol during acute exposure, which is sustained for about an hour after the application. In a 24-hour long-term exposure, the statistically significant changes in cortisol secretion were not noted [34], just as in Kurokawa et al [35] and Randon et al [36].…”

Section: Resultsmentioning

confidence: 99%

The influence of the low-frequency magnetic fields of different parameters on the secretion of cortisol in men

Woldańska-Okońska¹,

Czernicki²,

Karasek³

2013

International Journal of Occupational Medicine and Environmental Health

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Objectives: The aim of this paper is to test the influence of long-term application of the low-frequency magnetic fields in magnetotherapy and magnetostimulation on cortisol secretion in men. Materials and Methods: Patients were divided into three groups: 16 men underwent magnetotherapy and 20 men (divided into two groups) underwent magnetostimulation. Magnetotherapy -2 mT induction, 40 Hz, bipolar square wave, was applied for 20 min to lumbar area. Magnetostimulation (Viofor Jaroszyk, Paluszak, Sieroń (JPS) system, M2P2 program) was applied to 10 patients for 12 min each day. The third group (10 patients) underwent magnetostimulation (Viofor JPS system, M3P3) for 12 min each day using a different machine. All groups had 15 rounds of applications at approximately 10:00 a.m. with intermissions on the weekends. Blood serum was taken four times in a 24-hour period, before applications, the day after applications and a month later. Chemiluminescence micromethod was used to indicate hormone concentrations. Data was statistically analyzed with the analysis of variance (ANOVA) method. Results: The statistically significant gains in the circadian cortisol profile at 4:00 p.m., before and after application, were observed as a decrease in concentration during magnetotherapy. In magnetostimulation, with the M2P2 program, a significant increase in the cortisol concentration was observed in circadian profile at 12:00 p.m. one month after the last application. After magnetostimulation with the M3P3 program, a significant increase in concentration at 6:00 a.m. and a decrease in concentration at 12:00 p.m. were observed one month later. Statistically significant difference was demonstrated in the participants after the application of magnetotherapy and magnetostimulation with M3P3 program compared to the men submitted to magnetostimulation, with M2P2 program, at 4:00 p.m. after 15 applications. Conclusions: Biological hysteresis one month after magnetostimulation suggests long-term influence on the hypothalamohypophysial axis. The circadian curves of cortisol secretion a day after magnetotherapy and magnetostimulation with M3P3 program compared to magnetostimulation with M2P2 progam differs nearly by 100%, which proves that they show varied influence on cortisol secretion in men. All changes in the hormone concentration did not exceed the physiological standards of cortisol secretion, which suggests a regulating influence of magnetic fields on cortisol concentration rather than a strong stressogenic impact of magnetostimulation.

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Section: Resultsmentioning

confidence: 99%

The influence of the low-frequency magnetic fields of different parameters on the secretion of cortisol in men

Woldańska-Okońska¹,

Czernicki²,

Karasek³

2013

International Journal of Occupational Medicine and Environmental Health

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“…Chronic application of 2.9 mT, 50 Hz EMF lowered the level of LH, whereas no changes were observed after chronic exposure to 25-80-µT, 200 Hz EMF [42] and acute exposure to 10 µT, 40 Hz (continuous or intermittent) [41] or to GSM-standard [32]. Woldanska-Okonska et al [42] observed a decrease in prolactin concentrations following chronic application of EMF (25-80 µT, 200 Hz and 2.9 mT, 40 Hz, for 3 weeks) whereas acute exposure to 1 µT, 50 Hz [30] or 20 µT, 50 Hz did not influence the concentrations of this hormone [39].…”

Section: Electromagnetic Fields and Pituitary Hormonesmentioning

confidence: 88%

“…No significant effects of EMF on the secretion of growth hormone and FSH have been found [32,39,41,42] (Table 2). Chronic application of 2.9 mT, 50 Hz EMF lowered the level of LH, whereas no changes were observed after chronic exposure to 25-80-µT, 200 Hz EMF [42] and acute exposure to 10 µT, 40 Hz (continuous or intermittent) [41] or to GSM-standard [32].…”

Section: Electromagnetic Fields and Pituitary Hormonesmentioning

confidence: 94%

“…In the majority of studies, no effect of EMF on cortisol secretion have been found [22,30,32,34,39,41] (Table 2). However, Woldanska-Okonska and Czernicki [44], studying cortisol concentration in four time points (06:00, 12:00, 16:00, and 24:00), observed different changes following chronic exposure to EMF of 2.9 mT, 40 Hz in comparison to 25-80 µT, 200 Hz.…”

Section: Electromagnetic Fields and Pituitary -Adrenal Axismentioning

confidence: 99%

“…Although EMFinduced suppression on nocturnal melatonin secretion has been reported in occupational and residential studies [15,16,17,18,19,20], in the majority of laboratory-based exposure studies [21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39], EMF did not exert a distinct influence on melatonin or 6-hydroxymelatonin concentrations[see 40] (Table 1). According to Karasek et al [28,40], discrepancies in the results may depend on different experimental paradigms, including differences in certain characteristics of the applied magnetic fields, such as field induction, frequency, duration of exposure, timing of exposure, applied vector, etc.…”

Section: Electromagnetic Fields and Melatoninmentioning

confidence: 99%

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Electromagnetic Fields and Human Endocrine System

Karasek

Woldańska-Okońska

2004

The Scientific World JOURNAL

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Extremely low frequency electromagnetic fields (ELF EMF) are commonly present in daily life all over the world. Moreover, EMF are used in the physiotherapy of many diseases because of their beneficial effects. There is widespread public concern that EMF may have potential consequences for human health.Although experimental animal studies indicate that EMF may influence secretion of some hormones, the data on the effects of EMF on human endocrine system are scarce. Most of the results concentrate on influence of EMF on secretion of melatonin. In this review, the data on the influence of EMF on human endocrine system are briefly presented and discussed.KEYWORDS: electromagnetic fields, endocrine system, hormones DOMAINS: microscopy, medicine, endocrinology, sport medicine and physiotherapy. INTRODUCTIONExtremely low frequency electromagnetic fields (ELF EMF) are commonly present in daily life all over the world. They are associated with the use of electric power applied in residential and occupational environments. Wherever electricity is generated, transmitted, or used, electric and magnetic fields are created due to the presence of motion of electric charges. They are emitted by power lines, electrical panels, transformers, and service wires, but also by such household appliances as televisions, electric blankets, hair driers, etc. [1]. Moreover, electromagnetic fields (EMF) are used in the physiotherapy of many diseases (e.g., low back pain syndrome, migraine and vasomotoric headaches, multiple sclerosis, degenerative processes of the bones and joints, rheumatoid arthritis) because of their beneficial effects (e.g., improvement of soft tissue regeneration processes, vasodilatory action, acceleration of bone adhesion formation, anti-inflammatory and analgesic action) [2,3].There is widespread public concern that EMF may have potential consequences for human health [1,4,5], especially associated with increased risk for cancer and childhood leukemia [5]. 23 Karasek and Woldanska-Okonska: EMFs and hormones TheScientificWorldJOURNAL (2004) 4(S2), 23-28 Additionally some attention has also been paid to other possible health hazards, such as interference with cardiac pacemakers[6], Alzheimer's disease [7], and adverse pregnancy outcome [8].Although there is still scientific controversy concerning that problem, it seems to be a growing consensus that human health hazard associated with exposure to EMF is either very small or restricted to small subgroups. A Working Group organized by the National Institute of Environmental Health Services concluded in a report published in 1998, on the basis of almost 900 publications, that: "None of the evidence for adverse health effects seen after exposure to ELF EMF achieved a degree of evidence exceeding 'inadequate' (for humans) or 'weak' (for experimental animals)" [1].Studies on the effects of EMF in humans concentrate mainly on power line frequency fields or fields used in mobile phones. The influence of ELF EMF used in physiotherapy on the endocrine system was rarely exa...

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Low-level exposure to pulsed 900 MHz microwave radiation does not cause deficits in the performance of a spatial learning task in mice

Sienkiewicz

Blackwell

Haylock

et al. 2000

Bioelectromagnetics

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There is some concern that short‐term memory loss or other cognitive effects may be associated with the use of mobile cellular telephones. In this experiment, the effect of repeated, acute exposure to a low intensity 900 MHz radiofrequency (RF) field pulsed at 217 Hz was explored using an appetitively‐motivated spatial learning and working memory task. Adult male C57BL/6J mice were exposed under far field conditions in a GTEM cell for 45 min each day for 10 days at an average whole‐body specific energy absorption rate (SAR) of 0.05 W/kg. Their performance in an 8‐arm radial maze was compared to that of sham‐exposed control animals. All behavioral assessments were performed without handlers having knowledge of the exposure status of the animals. Animals were tested in the maze immediately following exposure or after a delay of 15 or 30 min. No significant field‐dependent effects on performance were observed in choice accuracy or in total times to complete the task across the experiment. These results suggest that exposure to RF radiation simulating a digital wireless telephone (GSM) signal under the conditions of this experiment does not affect the acquisition of the learned response. Further studies are planned to explore the effects of other SARs on learned behavior. Bioelectromagnetics 21:151–158, 2000. Published 2000 Wiley‐Liss, Inc.

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Effects of Pulsed High-Frequency Electromagnetic Fields on the Neuroendocrine System

Cited by 72 publications

References 19 publications

The influence of the low-frequency magnetic fields of different parameters on the secretion of cortisol in men

The influence of the low-frequency magnetic fields of different parameters on the secretion of cortisol in men

Electromagnetic Fields and Human Endocrine System

Low-level exposure to pulsed 900 MHz microwave radiation does not cause deficits in the performance of a spatial learning task in mice

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