Elucidation of the Motor unit firing behaviors in various human muscles

阐明各种人体肌肉的运动单位放电行为

• 批准号: 14580066
• 负责人: MIZUMURA Shinji
• 金额: $ 2.18万
• 依托单位: Meiji University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14580066/
• 关键词: Motor unit; recruitment threshold; firing rate; Vastus medialis muscle; Quadrifilar wire electrode; 動員闘値; 脱動員闘値; 脱動員閾値

Purpose of the present research was to elucidate the motor unit firing behaviors in various human muscles during voluntary isometric force exertion. First, I improved the quadrifilar needle electrode which is used in the precision decomposition technique. As a result, the quadrifilar wire electrode which can detect the intra-muscular myoelectric signal of vastus medialis muscle was produced. Next, the recruitment threshold, the de-recruitment threshold, and the firing rate of the motor unit in the vastus medialis muscle were verified. The positive correlation was observed between the recruitment and de-recruitment threshold of the motor units. The negative correlation was observed between the recruitment threshold and the firing frequency of the motor units. These results indicate that the concept of the "Onion skin phenomenon" is also adapted in the vastus medialis muscle.

本研究的目的是阐明在随意等长力量消耗过程中，人体不同肌肉的运动单位放电行为。首先，对精密分解技术中的四股针状电极进行了改进。研制出能检测股内侧肌肌电信号的四股线电极。接下来，验证股内侧肌中运动单位的募集阈值、去募集阈值和放电率。运动单位的募集阈值与去募集阈值之间呈正相关。募集阈值与运动单位放电频率呈负相关。这些结果表明，“洋葱皮现象”的概念也适用于股内侧肌。

项目成果

筋内電気活動の解析方法に関する研究

肌内电活动分析方法的研究

• 发表时间: 2007
• 期刊: 明治大学人文科学研究所紀要 60巻
• 作者: Mizumura;S.;Maezawa;K.;Ohtsuki;T.;水村信二;水村信二
• 通讯作者: 水村信二

Precision decomposition of intra-muscular myoelectric signals during voluntary isometric ramp and ballistic contractions on human vastus medialis muscle.

人体股内侧肌自愿等长斜坡和弹道收缩期间肌内肌电信号的精确分解。

• 发表时间: 2002
• 期刊: Journal of Humanities, Meiji University 8
• 作者: Shinji Mizumura

A study on methods for analyzing human intra-muscular electric signals.

人体肌内电信号分析方法的研究。

• 发表时间: 2006
• 期刊: Journal of Humanities, Meiji University (in Japanese) (in press)
• 作者: Mizumura;S.
• 通讯作者: S.