• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

1995 Fiscal Year Final Research Report Summary

Assessment of deteriorated muscle function using interrelationship among electromyogram, acoustic myogram and force.

Research Project

Project/Area Number 06680133
Research Category

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

Allocation TypeSingle-year Grants
Research Field 体育学
Research InstitutionInstitute for Developmental Research, Aichi Prefectural Colony

Principal Investigator

MITA Katsumi  Director, Dept.of Therapeutics, Institute for Developmental Research, Aichi Prefectural colony, 治療学部, 部長 (40100169)

Co-Investigator(Kenkyū-buntansha) ITOH Kunihiko  Associate, Dept.of Therapeutics, Institute for Developmental Research, Aichi Pre, 治療学部, 研究助手
AKATAKI Kumi  Researcher, Dept.of Therapeutics, Institute for Developmental Research, Aichi Pr, 治療学部, 研究員 (30280811)
Project Period (FY) 1994 – 1995
Keywordselectromyogram / acoustic myogram / muscle force / muscle contraction / muscle atrophy / cerebral palsy
Research Abstract

In order to maintain good health and to improve physical fitness in persons with physical disabilities, someappropriate exercise therapy using residual physical functions which contribute to development of latent abilities should be considered. The present study focused on the muscle function for patients with physical disabilities. The experimental study was designed to compare electromyogram (EMG) and acoustic myogram (AMG) recordings of bicepsbrachii muscles in patients with spastic cerebral palsy (CP). The maximal voluntary contraction (MVC) in the CP group was approximately one-half of that of the normal group even after being normalized by the muscle cross-sectional area (CSA). Both CP and normal groups demonstrated a progressive increase in the root mean squared values per unit muscle CSA in the EMG (RMS_<EMG>/CSA) as well as in the AMG (RMS_<AMG>/CSA) with increasing force up to 50% MVC.The increasing magnitude of the RMS_<EMG>/CSA with force was not significantly different between two subject groups. However, all the levels of forces resulted in significantly smaller RMS_<AMG>/CSA in the CP group compared to the normal group. The ratios of RMS_<AMG> to RMS_<EMG> in the CP group were significantly smaller than that in the normal group at force levels above 30% MVC.These results suggest that motor disabilities in CP patients are caused not only by primary neural impairment but also secondary deterioration in muscular contractile properties, probably resulting from muscle fiber atrophy. This appears to be more selective in fast twitch fibers.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 赤滝久美ほか: "筋音による筋収縮過程の推定" 医甲電子と生体工学(BME). 8. 30-38 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 赤滝久美ほか: "筋電図と筋音を用いた脳性麻痺患者の筋機能の分析" リハビリテーション医学. 31. 551-554 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 伊東保志 ほか: "筋音を用いた持続性筋収縮過程の分析" 疲労と体養の科学. 10. 75-81 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Akataki K. et al.: "Acoustic and electrical activities during voluntary isometric confraction of biceps brachii muscles in patients with spostic cerebral palsy" Muscle & Nerve. (in press).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Akataki K. et al.: "Power spectrol analysis of acoustic myogram of biceps brachii muscles during fatiguing sustained contraction" Europian Journal of Applied Physiology. (submitted).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 伊東保志ほか: "筋音による筋疲労の計測" 人間工学. (投稿中).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Akataki K.et al.: "Estimation of muscle contraction process using acoustic myography." BME. 8. 30-38 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Akataki K.et al.: "Analysis of muscle function of patients with cerebral palsy by electromyogram and muscle sound." Jpn J Rehabil Med. 31. 551-554 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Itoh Y.et al.: "Investigation of fatigue during sustained isometric contraction by electromyography and muscular sound." Hiro to Kyuyo no Kagaku. 10. 75-82 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Akataki K.et al.: "Acoustic and electrical activity during voluntary isometric contraction of biceps brachii muscles in patients with spastic cerebral palsy." Muscle & Nerve. In press.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Akataki K.et al.: "Power spectral analysis of acoustic myogram of biceps brachii muscles during fatiguing sustained contraction." Eur J Appl Physiol. submitted.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Itoh.et al.: "Assessment of muscular fatigue using acoustic myography" Jpn J Ergonomics. submitted.

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 1997-03-04  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi