The Journal of Korean Physical Therapy

The Korean Society of Physical Therapy (대한물리치료학회)
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The Effect of Electroacupuncture on Pain Threshold and 5.Hydroxytryptamine Synthesis Induced by Nociception in the Raphe Magnus Nucleus of Dog Brain Stem

개의 발에 염증 유발 후 전침이 통증역치 및 뇌줄기 큰솔기핵의 5-Hydroxytryptamine 합성에 미치는 효과

  • Cho, Mi-Suk (Department of Physical Therapy, Korea Nazarene University)
  • 조미숙 (나사렛대학교 물리치료학과)
  • Received : 2010.10.15
  • Accepted : 2011.02.11
  • Published : 2011.02.25
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Abstract

Purpose: The purpose of this study was to investigate the effect of electroacupuncture on pain threshold and 5-HT synthesis in raphe magnus nucleus of dog brain stem following nociception induced by 1% carageenan. Method: Twenty male dogs were randomly divided into two groups, a control group and an electroacupuncture group with the following parameters: ST36, LI11 and SP9 with 120Hz and 0.5mA. The dogs were sacrificed at 30, 60, 90, 120, 150 and 180 min after nociception using 1% carageenan injection into the plantar side of the dog's left leg. The pain threshold was recorded by an Analgesia-meter. After making brain slice sections, the tissues were immunostained with 5-HT antisera (1:2,500). Results: The pain threshold for the electroacupuncture group was higher than for the control group. The number of 5-HT immunoreactive neurons in the electroacupuncture group was greater than that of the control group. Differences between the two groups regarding the number of 5-HT immunoreactive neurons at 30 min and 60 min (p<0.05), at 120 min and 150 min (p<0.01), and at 8 days (p<0.05) were significant. Conclusion: The increases in pain threshold and number of 5-HT immunoreactive neurons in the raphe magnus nucleus of dog brain stem showed that electroacupuncture can attenuate pain transduction through the descending tract.

Keywords

References

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