リズミカルな関節運動におけるカオス的特徴

• 岩瀬 弘和

  神奈川大学 工学部

• 村田 厚生

  広島市立大学 情報科学部

書誌事項

タイトル別名

• Chaotic features of rhythmic joint movement.
• リズミカル ナ カンセツ ウンドウ ニ オケル カオステキ トクチョウ

抄録

The purpose of this research is to show the chaotic features of rhythmic joint movement using a reconstructed phase portrait, fractal dimension, and first Lyapunov exponent. The subjects were ten male students who were right-handed. Right elbow angle during rhythmic joint movement was measured by a goniometer. Pacing was provided for ten periodic intervals (ranged from 0.5 to 1.4s in steps of 0.1s) and preferred tempo (personal tempo). All trials were recorded for 20s. When the frequency of the pace increased, both fractal dimension and first Lyapunov exponent tended to increase. The first Lyapunov exponents were positive for all values of the observed data. These results indicate that there is chaos in rhythmic joint movement and that the larger the frequency, the more chaotic the joint movement becomes. Moreover, five right-handed and five left-handed subjects conducted single-forearm movements for the left arm and the right arm separately. As a result, fractal dimension and first Lyapunov exponent for the data of elbow joint angle in dominant hand were higher than that in non-dominant hand.

収録刊行物

• 人間工学

  人間工学 38 (4), 196-204, 2002

  一般社団法人 日本人間工学会

キーワード

• 屈伸運動
• カオス解析
• フラクタル次元
• リアプノフ指数

詳細情報

• CRID: 1390001204532869120
• NII論文ID: 10011171247
• NII書誌ID: AN00199371
• DOI: 10.5100/jje.38.196
• ISSN: 18842844
• ISSN: 05494974
• ISSN: http://id.crossref.org/issn/05494974
• NDL書誌ID: 6273558
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6273558
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可