Extremely low frequency, weak electric fields affect schedule-controlled behaviour of monkeys

Gavalas-Medici, R.; Day-Magdaleno, S. R.

doi:10.1038/261256a0

Cited by 65 publications

(13 citation statements)

References 8 publications

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“…Despite extensive research in the field of low-level microwave effects on the nervous system during recent decades (Johnson and Guy, 1972;Bawin et al, 1973;Baranski and Edelwejn, 1975;Gavalas-Medici and Day-Magdaleno, 1976;Chizhenkova, 1988;Mann and Roschke, 1996;Vorobyov et al, 1997;Wagner et al, 1998;Lutty et al, 2000), the reports of possible effects are often contradictory and the mechanisms behind the effects are still unclear. The difficulties in independent repeating of the experimental results cause doubt in these effects.…”

Section: Thermal and Non-thermal Effectsmentioning

confidence: 96%

Non-Thermal Effect of Microwave Radiation on Human Brain

et al. 2005

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This study focuses on an origin of interaction mechanism of microwave radiation with nervous system-quasi-thermal field effect. The microwave field can cause fluctuations and vibration of the charged particles and membranes in tissues. The hypothesis is, that this phenomenon is similar to the effect caused by Brown motion initiated by temperature and results in the same effects without rise in temperature. The electric field of 1 V/cm can introduce disturbance of the thermal equilibrium inside a cell of 10 µm radius, which is equivalent to disturbance produced by temperature rise of 1 K. The hypothesis, that microwave heating should cause an effect independent of the microwave modulation frequency, while field effect depends on modulation frequency, was examined experimentally. The 450 MHz microwave radiation, modulated at 7, 14 and 21 Hz frequencies, power density at the skin 0.16 mW/cm 2 , was applied. The experimental protocol consisted of two series of five cycles of the repetitive microwave exposure at fixed modulation frequencies. Relative changes in EEG theta, alpha and beta rhythms of the group of 13 healthy volunteers were analysed. Analysis of the experimental data shows that:(1) statistically significant changes in EEG rhythms depend on modulation frequency of the microwave field; (2) microwave stimulation causes an increase of the EEG energy level; (3) the effect is most intense at beta1 rhythm and higher modulation frequencies. These findings confirm the quasi-thermal origin of the effect, different from average heating.

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Section: Thermal and Non-thermal Effectsmentioning

confidence: 96%

Non-Thermal Effect of Microwave Radiation on Human Brain

et al. 2005

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“…For instance, neurophysiological effects in nonhuman primates were observed to have different field intensity thresholds at different frequencies. For a 7 Hz field the threshold was lower than for 60 Hz and 75 Hz [Gavalas-Medici and Day-Magdaleno, 1976]; the authors noted that 7 Hz is in the frequency range of normal brain wave activity. A recent study [Bawin et al, 1996] of field effects on a specific brain activity known as rhythmic slow activity, or theta rhythm, provided evidence that 1 Hz MF (56 and 560 mT, but not 5.6 mT) triggered the irreversible destabilization of theta rhythm in brain tissues of rats; fields at 60 Hz did not show statistically significant results.…”

Section: Time-varying Fields (>003 Hz)mentioning

confidence: 96%

Waveform magnetic field survey in Russian DC and Swiss AC powered trains: A basis for biologically relevant exposure assessment

Птицына

Kopytenko

Villoresi

et al. 2003

Bioelectromagnetics

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Recent epidemiological studies suggest a link between transport magnetic fields (MF) and certain adverse health effects. We performed measurements in workplaces of engineers on Russian DC and Swiss AC powered (16.67 Hz) electric trains using a computer based waveform capture system with a 200 Hz sampling rate. MF in DC and AC trains show complex combinations of static and varying components. The most probable levels of quasistatic MF (0.001-0.03 Hz) were in the range 40 microT. Maximum levels of 120 microT were found in DC powered locomotives. These levels are much higher than the geomagnetic field at the site of measurements. MF encountered both in DC and AC powered rail systems showed irregular temporal variability in frequency composition and amplitude characteristics across the whole frequency range studied (0-50 Hz); however, more than 90% of the magnetic field power was concentrated in frequencies

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“…Many of the measurements made in these studies related to the behavior of the animals; in general, mammals were found to increase their activity in response to electric field exposure (Graves, 1977;Hjeresen et aI., 1980;Rosenberg et aI., 1983) while in avian species activity was not uncommonly suppressed (Bankoska et aI., 1976;Graves et aI., 1978) by this treatment. Nonhuman primates also exhibit minor behavioral changes associated with electric field exposure (Gavalas et al, 1970;Gavalas-Medici and Day-Magdaleno, 1976).…”

Section: Russel 1 Reitermentioning

confidence: 99%

Changes in Circadian Melatonin Synthesis in the Pineal Gland of Animals Exposed to Extremely Low Frequency Electromagnetic Radiation: A Summary of Observations and Speculation on Their Implications

Reíter¹

1992

Electromagnetic Fields and Circadian Rhythmicity

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Extremely low frequency, weak electric fields affect schedule-controlled behaviour of monkeys

Cited by 65 publications

References 8 publications

Non-Thermal Effect of Microwave Radiation on Human Brain

Non-Thermal Effect of Microwave Radiation on Human Brain

Waveform magnetic field survey in Russian DC and Swiss AC powered trains: A basis for biologically relevant exposure assessment

Changes in Circadian Melatonin Synthesis in the Pineal Gland of Animals Exposed to Extremely Low Frequency Electromagnetic Radiation: A Summary of Observations and Speculation on Their Implications

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