SDA法による高齢者と若年者の姿勢制御能の評価  [in Japanese] Evaluation of postural control between aged and young using stabilogram-diffusion analysis  [in Japanese]

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Author(s)

    • 山下 和彦 YAMASHITA Kazuhiko
    • 東京医療憚健大学医療保健学部医療情報学科 Tokyo Health Care University, Faculty of Health Care, Division of Health Care Information
    • 井野 秀一 INO Shuichi
    • 東京大学先端科学技術研究センター University of Tokyo, Research Center for Advanced Science and Technology
    • 伊福部 達 IFUKUBE Toru
    • 東京大学先端科学技術研究センター University of Tokyo, Research Center for Advanced Science and Technology
    • 小山 裕徳 KOYAMA Hironori
    • 東京電機大学工学部情報メディア学科 Tokyo Denki University, Faculty of Engineering, Department of Information Systems and Multimedia Design
    • 川澄 正史 KAWASUMI Masashi
    • 東京電機大学工学部情報メディア学科 Tokyo Denki University, Faculty of Engineering, Department of Information Systems and Multimedia Design

Abstract

下肢筋力や姿勢制御前の衰えた高齢者にとって転倒は共通かつ深刻な問題の1つである。高齢者の加齢による姿勢制御前と転倒の関連のメカニズムはまだ十分に明らかではない。そこで本研究では、SDA法を用いて若年者と高齢者の姿勢制御前のメカニズムの違いを明らかにすることを目的とした。解析では、重心動揺計から得られるSDA法のパラメータと姿勢動揺の指標であるCOPのパラメータを比較した。対象者は、48人の健常若年者(18-64歳、平均年齢33.6±14.6歳)と41名の健常高齢者(65-87歳、平均年齢77.7±4.3歳)である。実験方法は、重心動揺計上に開眼、閉眼の静止立位で30秒間計測を行った。その結果、以下の項目が示唆された。1.高齢者群は若年者群に比べて有意に拡散係数D_<rs>およびMSCDが開閉眼ともに大きかった。2.高齢者群において、SDAとCOPのパラメータは開眼時より閉眼時の方が高い相関が認められた。3.拡散係数D_<rs>と前後方向の移動範囲は左右方向の移動範囲よりも高い相関が認められた。これは前頸骨筋、足底の筋に由来する影響と考えられる。

Falling is one of the most common and serious problems because advancing age has been associated with muscle weakness and deterioration of postural control system. The mechanisms contributing to age-related increases in ability of postural control and falls in the elderly remain unclear. The purpose of the stabilogram-diffusion analysis (SDA) method was to study change of the mechanism of postural control between young and elderly generation. Any parameters of SDA were compared with several parameters of body sway derived from recordings of the center of pressure (COP) with the aid of a static force platform. The subjects were 48 healthy young volunteers (age: 18-64 yeas, mean ± S.D: 33.6±14.6 years) and 41 healthy elderly volunteers (age: 65-87 years, mean ± S.D: 77.7±4.3 years). They quietly stood on a static force plat form with open and closing eyes for thirty seconds. The following results were indicated. 1. The elderly group was a significantly than the young group greater in the Diffusion constant Drs and the mean square critical displacement when eyes open and eyes closed. 2. On the elderly group, the correlation between SDA parameters and COP parameters was found to be greater in the closing eye condition than that in the open eye condition. 3. The correlations between diffusion coefficient and the range of anterior-posterior was greater than the correlations between the diffusion coefficients and the range of medio-lateral. Thus, the muscle of the tibialis anterior and the planter muscles was suggested.

Journal

  • Bulletin of Tokyo Healthcare University

    Bulletin of Tokyo Healthcare University 2(1), 43-51, 2006

    Tokyo Healthcare University

Codes

  • NII Article ID (NAID)
    110006978202
  • NII NACSIS-CAT ID (NCID)
    AA1221071X
  • Text Lang
    JPN
  • Data Source
    NII-ELS 
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