Journal of Ginseng Research

The Korean Society of Ginseng (고려인삼학회)
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Ginseng Extract Regulates the Alterations of Sleep Architecture and EEG Power Spectra in Restraint Stressed Rats

  • Ma, Yuan (Beijing Institute of Pharmacology & Toxicology) ;
  • Eun, Jae-Soon (College of Pharmacy, Woosuk University) ;
  • Yang, Shulong (Research Institute Veterinary Medicine, Chungbuk National University) ;
  • Lee, Kwang-Seung (Research Institute of Nonghyup Korea Ginseng) ;
  • Lee, Eun-Sil (Research Institute of Nonghyup Korea Ginseng) ;
  • Kim, Chung-Soo (College of Pharmacy, Chungbuk National University) ;
  • Oh, Ki-Wan (College of Pharmacy, Chungbuk National University)
  • Published : 2010.03.31
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Abstract

The present investigation was conducted to evaluate the regulation of sleep architecture by the red ginseng water extract (RGE) in acutely and chronically restraint stressed rats. Adult rats were fitted with sleep.wake recording electrodes. Following post-surgical recovery, rats were extensively habituated for freely moving polygraphic recording conditions. Polygraphic signs of sleep-wake activities were recorded for 24 h after RGE administration and induction of stress and were analyzed to understand the regulation of sleep architecture. Acute stress decreased wakefulness and increased total sleep, non-rapid eye movement (NREM) sleep, and rapid eye movement (REM) sleep in both the daytime and nighttime recording. RGE shortened the daytime NREM and REM sleep, without changing the wakefulness and total sleep. RGE increased nighttime wakefulness, and decreased total, NREM and REM sleep. Chronic stress increased wakefulness and decreased total sleep in the daytime recording, and increased REM and decreased NREM sleep in both the day and night time recording. RGE ameliorated chronic stress and induced alterations of REM and NREM sleep in the day and night time sleep architecture. Acute and chronic stress could also induce alternations in cortex electroencephalogram (EEG) recording during NREM, REM sleep and wakefulness. These findings suggest that RGE may modulate the sleep behavior in acutely and chronically stressed rats and the ameliorating effect of RGE on the sleep architecture may involve in modulation of $\alpha$-, $\theta$- and $\delta$- wave activities of the cortical EEG.

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References

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