Thermopreferendum during sleep is modified by radiofrequency electromagnetic radiation exposure during development

Abstract : Objectives : sleep disturbances by GSM-type radiofrequency electromagnetic fields (RF-EMF) emitted by mobile phone base stations are not well-established. In a previous study, we pointed out that most effects of RF-EMR were dependent on the thermal environment, suggesting that RF-EMR exposure may modify sleep through interactions with thermoregulatory processes. In the present study, juvenile rats exposed to RF-EMR were allowed to choose their thermal environment corresponding to the 'thermopreferendum'. Methods : 6 Wistar rats (three weeks-old) exposed to RF-EMR during five weeks were compared to a non-exposed control group (n=4). One week after surgery, sleep was measured (wireless) when animals were allowed to move freely between three similar communicating rooms which differed according to ambient temperature (24, 28 and 31+-1 °C). Wakefulness (W), Slow Wave (SWS) and Paradoxical Sleep (PS) were scored at 10 second-periods. The total durations of sleep stages, the mean durations and the frequencies of the episodes were tested with ANOVA. Results : exposed rats preferred to sleep at 31 °C whereas the controls preferred 28°C. The choice of 31 °C induced longer total time sleep (+139 and +103 min compared to 24 and 28 °C respectively) as a result of longer total durations of SWS (compared to 24 °C : +107.4 min) and of PS (compared to 24 and 28 °C: +9 and +7 min respectively). Conclusion : thermopreferendum during sleep was increased when exposed to RF-EMR suggesting modifications of the peripheral thermosensitivity. This observation and the longer sleep duration suggest that the RF-exposed group may develop behavioral responses to prevent energy expenditure.
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Submitted on : Wednesday, April 2, 2014 - 3:58:45 PM
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  • HAL Id : ineris-00970994, version 1
  • INERIS : EN-2012-192

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Amandine Pelletier, P. Decima, Stéphane Delanaud, Jean-Pierre Libert, Véronique Bach, et al.. Thermopreferendum during sleep is modified by radiofrequency electromagnetic radiation exposure during development. 26. Annual Meeting of the Associated Professional Sleep Societies, LLC (APSS), Jun 2012, Boston, United States. ⟨ineris-00970994⟩

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