The Journal of Korean Physical Therapy

The Korean Society of Physical Therapy (대한물리치료학회)
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Change of Pain Threshold and Nociceptive Flexion Reflex of Hyperalgesia Rat by High Voltage Pulsed Current

고전압맥동전류가 통각과민 백서의 통각역치 및 유해성 굴곡반사에 미치는 영향

  • Kim, Su-Hyon (Department of Physical Therapy, Gokseong factory, Kumhotire co. inc.) ;
  • Moon, Dal-Ju (Department of Physical Therapy, Suncheon Hyoja Hospital) ;
  • Choi, Sug-Ju (Department of Physical Therapy, Taegu Science College) ;
  • Jung, Dae-In (Department of Physical Therapy, Cho sang-gu Surgery) ;
  • Lee, Jung-Woo (Department of Physical Therapy, Graduate School, Dongshin University) ;
  • Jeong, Jin-Gyu (Department of Physical Therapy, Chunnam Techno College) ;
  • Kim, Tae-Youl (Department of Physical therapy, Dongshin University)
  • 김수현 (금호타이어 곡성공장 물리치료실) ;
  • 문달주 (순천효자병원 물리치료실) ;
  • 최석주 (대구과학대학 물리치료과) ;
  • 정대인 (조상구외과의원 물리치료실) ;
  • 이정우 (동신대학교 대학원 물리치료학과) ;
  • 정진규 (전남과학대학 물리치료과) ;
  • 김태열 (동신대학교 물리치료학과)
  • Published : 2006.04.25
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Abstract

Purpose: This study conducted quantitative sensory test and nociceptive flexion reflex(NFR) measurement to examine degree of pain depending on polarity of high voltage pulsed current(HVPC) of hyperalgesia site in hyperalgesia rat by local thermal injury. mechanical pain threshold, thermal pain threshold and root mean square of NFR were measured. Methods: This study was conducted with control group I of hyperalgesia rat at hind paw by thermal injury and experimental groups divided into cathodal HVPC group II, anodal HVPC group III and alternate HVPC group IV. It measured pain threshold and root mean square(RMS) of NFR and obtained the following results. Results: Mechanical pain threshold of hyperalgeisa site was significantly increased at groups II, III and IV applying HVPC group compared to control group, but there was no difference among HVPC groups. Thermal pain threshold of hyperalgesia site showed a significant increase in group II. Group III showed significant difference after 4 days of hyperalgesia. RMS of NFR at hyperalgeisa site was significantly reduced in group II after 2 days of hyperalgesia. Group III showed significant decrease after 5 and 6 days of hyperalgesia. Conclusion: Consequently it was found that application of HVPC of hyperalgesia site increased pain threshold at hyperalgesia site by mechanical stimuli and thermal stimuli. NFR by electrical stimuli was similar to pain threshold by mechanical stimuli. Effects by polarity of HVPC showed the greatest reduction of hyperalgesia when cathodal electrode was used.

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