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Experimental study on the mechanism of pain induction in the reflex sympathetic dystrophy

Research Project

Project/Area Number 04454385
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 麻酔学
Research InstitutionNIIGATA UNIVERSITY

Principal Investigator

SHIMOJI Koki  Niigata University School of Medicine Professor, 医学部, 教授 (30040158)

Co-Investigator(Kenkyū-buntansha) HOKARI Tamaki  Niigata University School of Medicine Assistant, 医学部附属病院, 助手 (10173577)
YOSHIMURA Megumu  Kurume University School of Medicine Lecturer, 医学部, 講師 (10140641)
FUJIWARA Naoshi  Niigata University School of Medicine Lecturer, 医学部附属病院, 講師 (70181419)
Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥5,900,000 (Direct Cost: ¥5,900,000)
Fiscal Year 1993: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1992: ¥3,600,000 (Direct Cost: ¥3,600,000)
KeywordsRefractory sensory nerve dystrophy / Sciatic nerve / Intracellular recording / Substantia gelatinosa neuron / Spinal cord potential / Supraspinal structures / 坐骨神経 / 神経破壊
Research Abstract

To investigate the mechanism of pain induction in reflex sympathetic dystrophy (RSD), we observed behaviors of RSD model rats and recorded neuronal activities of their spinal cord in vivo and in vitro. The RSD-model rats were prepa ; red by mechanical or chemical destruction of the sciatic nerve. Following the sciatic nerve destruction, abnormal behaviors such as biting the hind paws, running motion and paraplegia were observed. No abnormal behavior were observed in sham operated animal without the sciatic nerve destruction. In intracellular recording in the slice preparations of normal adult rats, monosynapotic EPSP and IPSP mediated by only the Asigma and C fibers, not by the Aalpha/beta fibers, werefound in substanitia gelatinosa neurons in respose to dorsal root stimulation. Polysynaptic postsynapyic potentials activated by Aalpha/beta fibers were recorded in a few substantia gelatinosa neurons. In the RSD model rats, monosynaptic potentials activated asigma and C fibers and polysynaptic inputs viaAalpha/beta fibers were observed in a majority of substantia gelatinosa neurons. Repetitive firings in substantia gelatinosa neurons were also observed following a dorsal root stimulation in slice preparations of the RSD model rats. Hetero-segmental spinal cord potentials consisted of two positive potentials (HSP1, HSP2) preceded by negatibe potentials were recorded at L4/5 in normal rats. There observed significant intensification in peak amplitude and elongation in duration in HSP1 and HSP2 in the RSD model animals. As these potentials might be produced by a feedback loop via supraspinal structures, abnormal neuronal excitation and intensification of the inhibitory potentials observed in the RSD model rats were thought to be mediated by segmental as well as supraspinal structures.

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] 馬場洋ら: "成熟ラット脊髄スライス標本における電気現象" 脊髄電気診断学. 14. 120-123 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Baba et al.: "Electrophysiological phenomena recorded from spinal cord slice preparation in the adult rat" Neurosci.Res.Suppl.17. S254 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 馬場洋ら: "成熟ラット脊髄スライス標本における電気現象-硬膜外通電法の作用機序について" 麻酔. 42 Suppl.S229 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Baba et al.: "Electrophysiological phenomena recorded from spinal cord slice preparation in the adult rat" Handbook of Spinal Cord Monitoring. 393-397 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Baba et al.: "Synaptic responses of substantia gelatinosa neurons to dorsal column stimulation in rat spinal cord in vitro" J.Physiol.(in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] K.Shimoji et al.: "Erb's point stimulation produces slow positive potentials in human lumber spinal cord" J.Clin.Neurophysiol.(in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Fujioka et al.: "Spinal cord monitoring and distruction force control during scoliosis surgery by conducted spinal cord potentials recorded from the epidural space" Br.J.Anaesth.in press.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Baba, Hiroshi et al.: "Electrophysiological phenomena recorded from spinal cord slice preparation in adult rat(in Japanese)" Sekizui Denki Shindangaku. 14(1). 120-123 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Baba, Hiroshi et al.: "Electrophysiological phenomena recorded from spinal cord slice preparation in adult rat" Neurosci. Res.17 Suppl. S254 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Baba, Hiroshi et al.: "Electrophysiological phenomena in spinal cord preparation of adult rat. Mechanism of epidutral stimulation therapy (in Japanese)" Masui. 42 Suppl. S229 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Baba, Hiroshi et al.: "Electrophysiological phenomena recorded from spinal cord slice preparation in the adult rat." Handbook of Spinal Cord Monitoring. pp.393-397 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Baba, Hiroshi et al.: "Synaptic responses of substantia gelatinosa neurons to dorsal column stimulation in rat spinal cord in vitro." J.Physiol. in press.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Shimoji, Koki, et al.: "Erb's point stimulation produces slow positive potentials in human lumber spinal cord." J.Clin.Neurophysiol. in press.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Fujioka, Hitoshi, et al.: "Spinal cord monitoring and distruction force control during scoliosis surgery by conducted spinal cord potentials recorded from the epidural space" Br.J.Anaesth. in press.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Baba et al.: "Electrophysiological phenomena recorded from spinal cord slice preparation in the adult rat" Neurosci.Res.,. Suppl.17. S254 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 馬場洋ら: "成熟ラット脊髄スライス標本における電気現象-硬膜外通電法の作用機序について" 麻酔. 42Suppl. S229 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] H.Baba et al.: "Electrophysiological phenomena recorded from spinal cord slice preparation in the adult rat" Handbook of Spinal Cord Monitoring. 393-397 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] H.Baba et al.: "Synaptic responses of substantia gelatinosa neurons to dorsal column stimulation in rat spinal cord in vitro" J.Physiol.(in press).

    • Related Report
      1993 Annual Research Report
  • [Publications] K.Shimoji et al.: "Erb's point stimulation produces slow positive potentials in human lumber spinal cord" J.Clin.Neurophysiol.(in press).

    • Related Report
      1993 Annual Research Report
  • [Publications] H.Fujioka et al.: "Spinal cord monitoring and distruction force control during scoliosis surgery by conducted spinal cord potentials recorded from the epidural space" Br.J.Anaesth.(in press).

    • Related Report
      1993 Annual Research Report
  • [Publications] 穂苅 環 他: "刺激鎮痛法" カレントテラピー. 10. 24-29 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Baba,H et al: "Electrophysiolgical phenomena recorded from spinal cord slice preparation in the adult rat" Neurosci.Research. Suppl.17. S254- (1992)

    • Related Report
      1992 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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