Effects of Electromagnetic Radiation Exposure on Stress-Related Behaviors and Stress Hormones in Male Wistar Rats

Mahdavi, Seyed Mohammad; Sahraei, Hedayat; Yaghmaei, Parichehreh; Tavakoli, Hassan

doi:10.4062/biomolther.2014.054

Cited by 27 publications

(29 citation statements)

References 31 publications

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“…These changes could be due to the food intake or catabolic action changes. In a previous study, we were evaluated 1 and 5 Hz ELF-EMF radiation affects on behavioral, hormonal, and metabolic of rats (Mahdavi et al, 2014). Results indicated that weight of irradiated rats did not change, and also no alter was observed in food and water intakes of rats after exposure to EMF-ELF in comparison to the control group.…”

Section: Discussionmentioning

confidence: 90%

Common behaviors alterations after extremely low-frequency electromagnetic field exposure in rat animal model

Mahdavi

Sahraei

Rezaei‐Tavirani

et al. 2015

Electromagnetic Biology and Medicine

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Naturally, the presence of electromagnetic waves in our living environment affects all components of organisms, particularly humans and animals, as the large part of their body consists of water. In the present study, we tried to investigate the relation between exposure to the extremely low-frequency electromagnetic field (ELF-EMF) and common behaviors such as body weight, food and water intake, anorexia (poor appetite), plasma glucose concentration, movement, rearing and sniffing in rats. For this purpose, rats were exposed to 40 Hz ELF-EMF once a day for 21 days, then at days 1, 3, 7, 14 and 21 after exposure, any changes in the above-mentioned items were assessed in the exposed rats and compared to the non-exposed group as control. Body weight of irradiated rats significantly increased only a week after exposure and decreased after that. No significant change was observed in food and water intake of irradiated rats compared to the control, and the anorexia parameter in the group exposed to ELF-EMF was significantly decreased at one and two weeks after irradiation. A week after exposure, the level of glucose was significantly increased but at other days these changes were not significant. Movements, rearing and sniffing of rats at day 1 after exposure were significantly decreased and other days these changes did not follow any particular pattern. However, the result of this study demonstrated that exposure to ELF-EMF can alter the normal condition of animals and may represent a harmful impact on behavior.

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Section: Discussionmentioning

confidence: 90%

Common behaviors alterations after extremely low-frequency electromagnetic field exposure in rat animal model

Mahdavi

Sahraei

Rezaei‐Tavirani

et al. 2015

Electromagnetic Biology and Medicine

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“…Many studies have examined ULF radiation prior to earthquakes [7,8,47], and some studies reported the leading times were between a few weeks and a month [4,48]. Some reports suggest that the ULF magnetic field affects behavior and hormones [49,50,51,52,53]. The electromagnetic field with a frequency of 10 Hz is known to affect circadian activity rhythms [52,53].…”

Section: Discussionmentioning

confidence: 99%

“…The electromagnetic field with a frequency of 10 Hz is known to affect circadian activity rhythms [52,53]. Mahdavi et al [49,51] have reported that exposures to electromagnetic fields with 5 Hz or 12 Hz elevated activity levels and adrenocorticotropic hormone concentrations in rats. Additionally, there have been reports that cattle aligned their body axes along geomagnetic field lines, which indicates they have the sense of magnetoreception [54,55,56].…”

Section: Discussionmentioning

confidence: 99%

Statistical Evaluations of Variations in Dairy Cows’ Milk Yields as a Precursor of Earthquakes

Yamauchi

Hayakawa

Asano

et al. 2017

Animals

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Simple SummaryThere are many reports of abnormal changes occurring in various natural systems prior to earthquakes. Unusual animal behavior is one of these abnormalities; however, there are few objective indicators and to date, reliability has remained uncertain. We found that milk yields of dairy cows decreased prior to an earthquake in our previous case study. In this study, we examined the reliability of decreases in milk yields as a precursor for earthquakes using long-term observation data. In the results, milk yields decreased approximately three weeks before earthquakes. We have come to the conclusion that dairy cow milk yields have applicability as an objectively observable unusual animal behavior prior to earthquakes, and dairy cows respond to some physical or chemical precursors of earthquakes.AbstractPrevious studies have provided quantitative data regarding unusual animal behavior prior to earthquakes; however, few studies include long-term, observational data. Our previous study revealed that the milk yields of dairy cows decreased prior to an extremely large earthquake. To clarify whether the milk yields decrease prior to earthquakes, we examined the relationship between earthquakes of various magnitudes and daily milk yields. The observation period was one year. In the results, cross-correlation analyses revealed a significant negative correlation between earthquake occurrence and milk yields approximately three weeks beforehand. Approximately a week and a half beforehand, a positive correlation was revealed, and the correlation gradually receded to zero as the day of the earthquake approached. Future studies that use data from a longer observation period are needed because this study only considered ten earthquakes and therefore does not have strong statistical power. Additionally, we compared the milk yields with the subionospheric very low frequency/low frequency (VLF/LF) propagation data indicating ionospheric perturbations. The results showed that anomalies of VLF/LF propagation data emerged prior to all of the earthquakes following decreases in milk yields; the milk yields decreased earlier than propagation anomalies. We mention how ultralow frequency magnetic fields are a stimulus that could reduce milk yields. This study suggests that dairy cow milk yields decrease prior to earthquakes, and that they might respond to stimuli emerging earlier than ionospheric perturbations.

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“…Studies in rats showed decrease in learning, memory processes, and anorexia cases under a certain frequency of EMF (Mahdavi, 2014). On the other hand, Ghrelin`s concentration must be increased in case of anorexia and is used in stimulating the learning processes.…”

Section: Introductionmentioning

confidence: 99%

Effects of High-Frequency Electromagnetic Field on Ghrelin`S Quantitative Changes and Animal Memory

Dondoladze

Nikolaishvili

Zurabashvili

2016

ESJ

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Ghrelin is one of the major ways of improving memory, which is approved by different amino acids ratio. However, reducing the concentration of Ghrelin helps to prevent the implementation of generated and stiffened nutritional act. The processes of stimulation cause various improvement of expressed behavior on positive stimulus. This is based on the type of overpass labyrinth for improving the reflexive behavior to two feeding test. These facts approve that the processes which was developed as a result of Ghrelin`s and EMF action and the central mechanisms of animals behavioral reaction on positive stimulus were connected to each other by morphofunctional and neurochemical organization.

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Effects of Electromagnetic Radiation Exposure on Stress-Related Behaviors and Stress Hormones in Male Wistar Rats

Cited by 27 publications

References 31 publications

Common behaviors alterations after extremely low-frequency electromagnetic field exposure in rat animal model

Common behaviors alterations after extremely low-frequency electromagnetic field exposure in rat animal model

Statistical Evaluations of Variations in Dairy Cows’ Milk Yields as a Precursor of Earthquakes

Effects of High-Frequency Electromagnetic Field on Ghrelin`S Quantitative Changes and Animal Memory

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