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Updated: Feb 13, 2026

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In vivo Measurement of Knee Extensor Muscle Function in Mice
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指を伸ばす際のインディシス・プロピュリウス伸縮器とインディシス・ディジトラム・コミュニス伸縮器の特徴: 電気ミオグラフィと運動学的研究
Shota Date1, Nanako Nakamae1, Hiroshi Kurumadani2
1Laboratory of Analysis and Control of Upper Extremity Function, Graduate School of Biomedical and Health Sciences, Hiroshima University, Japan.
The Journal of hand surgery, European volume
|February 12, 2026
まとめ
エクステンサー・インディシス・プロピュリウスは,指指を主に誘導し,外側に回転させ,エクステンサー・ディジトラム・コミニスとは違います. これらの異なる役割は,手指の運動学と潜在的移転結果を理解するために不可欠です.
科学分野:
- バイオメカニクス バイオメカニクス
- 人間の解剖学 人間の解剖学
- キネシオロジー キネシオロジー
背景:
- 指の指差し指 (Extensor Indicis Proprius,EIP) と指差し指 (Extensor Digitorum Communis,EDC) の機能的な区別は十分に確立されていない.
- これらの違いを理解することは,修復外科手術とリハビリテーションに不可欠です.
研究 の 目的:
- 指差し指の延長中にEIPとインデックスEDCの機能的および運動的差異を定量的に評価する.
- メタカルポファランゲス (MCP) 共同運動におけるEIPとインデックスEDCの特定の役割を解明する.
主な方法:
- 15人の健康な参加者は,孤立したEIP (一指) とインデックスEDC (四指) の拡張タスクを実行しました.
- 三次元運動分析により,関節運動学 (MCP 角度) が捉えられた.
- 表面エレクトロミオグラフィ (sEMG) は,筋肉の活性化パターンを測定しました.
主要な成果:
- sEMGは,一指伸縮時により高いEIP活動,四指伸縮時により高いインデックスEDC活動を確認しました.
- インデックスMCP関節は,EIP支配的な拡張時に,より大きなアドゥクション (14°対1°) と,より少ない内部回転 (-1°対5°) を示した.
- 動力学データによると,EIPは,手指の誘導と外部の回転に寄与する.
結論:
- EIPとインデックスEDCの間の解剖学的変異は,異なる運動機能をもたらします.
- これらの発見は,EIPの移転後の手指の動きの変化を予測する上で意味を持つ.
キーワード:
エレクトロミオグラフィー エレクトロミオグラフィーエクステンサー・ディジトラム・コミュニス (Digitorum communis) とはエクステンサーはインディシス・プロピュリウス (indicis proprius) である.指の伸ばし指は指の伸ばし指で,指の伸ばし指は指の伸ばし指で,指の伸ばし指は指の伸ばし指で指差し指の指を指差し指の指を指差し指の指を指差し指を指差し指を指差し指を指差し指を指差し指を指差し指を指差しキネマティクス (動力学) とは運動分析とは,運動の分析である.さらに関連する動画
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