人間の末梢神經刺激による誘發筋電圖の研究

• 本間 伊佐子

  国立東京第二病院生理科

書誌事項

タイトル別名

• Studies on the Evoked Electromyograzn by Stimulating Peripheral Nerve of Man

抄録

Lloyd, Eccles, Granit and others have clarified many brilliant fundamental facts in the observation of the electrical potentials at anterior horn, by direct electric stimulation of peripheral nerve in animal. Meanwhile, Hoffmann tried observation of evoked electromyogram, especially its wave-form, of innervating muscle by indirect, per-cutaneous, electric stimulation of human nerve, however, few successful results have been reported except Magladery's, due to difficulties in apparatus. Magladery conducted since 1950 remarkable studies on the evoked EMG, especially on its H-wave, of spinal reflex nature, by per-cutaneous stimulation of human N. tibialis, and reported his results in 1955. The author conducted experiments in order to, in part, test the results by Magladery and others and also to obtain some data for the clinical application of the evoked EMG method, upon 7 normal adults and 32 patients, by per-cutaneous electric stimulation of peripheral nerve, N. tibiailis, and observed the evoked EMG, Magladery's direct M-wave and H-wave of spinal reflex nature. Results were as follows:<br>1) Relation between duration of spare wave stimulation voltage and M-, H-waves of evoked EMG: If the duration of the electrical stimulation was altered from 1 m. sec. to 300 m. sec., the threshold of stimulation decreased and the effect of stimulation increased as the duration was increased.<br>2) When the H-wave by cutaneous induction is taken as index, the evoked EMG, for instance of M. gastrocnemius, will be transmitted to remarkably wide region, from several cm. above knee-joint to the end of foot, . Therefore, in case of diagnosis of muscular paralysis, it should be kept in mind that the evoked EMG will physically transmitted beyond asumption to very wide region.<br>3) In 15 cases of peripheral nervous disorders, abnormal findings such as raised threshold, lower potentials of evoked EMG or disappearance of its waves, extended latency and abnormal forms of wave etc. were observed. Through these abnormal findings, it is possible to know the degrees of nervous lesion and the process of nervous regeneration. Incidentally, in 1 cases, EMG of “Wurmartige Kontraktion” in EaR (electrical reaction of degeneration) could be observed. It was also applied in the diagnosis of symptoms in mysthenia gravis.<br>4) In 17 cases of motor disorders of lower extremities due to deseases of spinal cord, more or less deformations of H-wave were observed and the deformation was quite distinct in case of tumor or syphilis of spinal cord. In 3 cases of amyotrophic lateral sclerosis, poliomyelitis and lumbago, in which synchronization voltage were seen in their EMG, distinctly magnified amplitude of H-wave was observed.<br>In conclusion, it seems that method of evoked EMG will contribute, in addition to the diagnosis of peripheral nervous disorders, to the diagnosis of the disorders of spinal reflex tracts, through the investigation of the H-wave.

収録刊行物

• 医療

  医療 10 (6), 459-469, 1956

  一般社団法人 国立医療学会

詳細情報

• CRID: 1390282681292536320
• NII論文ID: 130004309416
• DOI: 10.11261/iryo1946.10.459
• ISSN: 18848729
• ISSN: 00211699
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可