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Development of evaluation system for measuring muscle metabolism

肌肉代谢测量评估系统的开发

基本信息

批准号：
07558139
负责人：
FUKUNAGA Tetsuo
金额：
$ 4.54万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07558139/
关键词：
EMG MMG NIRS oxygenation 筋血流量酸素摂取量筋

项目摘要

The purpose of the present study is to observe muscle metabolism by means of newly developped measuremten system (NDMS) which consisted of NIRS,MMG and EMG apparatus. Using the NDMS the muscle oxugenation was estimated during various muscle contractions. For example, when the knee extensor muscle such as rectus femoris, vastus lateralis, vastus medialis and vastus intermedius were contracted isometrically during such long time as over 50 minutes, i.e.muscle fatigued, the transfer of activity among each muscle was observed, especially, activity of rectus femoris muscle increased when other muscle inactivated andvise versa. The muscle oxygenation in these muscle group were accompanied by the changes in these activation level. On the other hand, when isometric contraction (knee extension) was performed intermittently 50 times with rested 3 seconds EMG and MMG activities obtained from knee extensor muscle decreaed by 70% and 50% respectively. The order of activation level of MMG was RF<VL<VM.This differences of MMG has been considered to be due to differences of muscle fiber type composition in each muscle group. From these results it is suggested that muscle fatigue affect on muscle activation pattern and metabolism, especially rectus femoris muscle indicats specific responces compared to other knee extensors.group were accompanied by the changes in these activation level. On the other hand, when isometric contraction (knee extension) was performed intermittently 50 times with rested 3 seconds EMG and MMG activities obtained from knee extensor muscle decreaed by 70% and 50% respectively. The order of activation level of MMG was RF<VL<VM.This differences of MMG has been considered to be due to differences of muscle fiber type composition in each muscle group. From these results it is suggested that muscle fatigue affect on muscle activation pattern and metabolism, especially rectus femoris muscle indicats specific responces compared to other knee extensors.

本研究的目的是利用最新研制的由近红外光谱(NIRS)、MMG和肌电图仪组成的测量系统(NDMS)来观察肌肉代谢。使用NDMS评估不同肌肉收缩时的肌肉氧合。例如，当膝关节伸肌如股直肌、股外侧肌、股内侧肌、股中间肌等长时间等长收缩超过50min，即肌肉疲劳时，可观察到各肌肉之间的活动转移，特别是当其他肌肉失活时，股直肌的活动增加，反之亦然。这些肌肉组的肌肉氧合伴随着这些激活水平的变化。而等长收缩(伸膝)间歇50次，休息3s，伸膝肌的肌电和肌电活动分别下降70%和50%。MMG的激活水平顺序为RF&lt；VL&Lt；VM。这种差异被认为是由于各肌群肌纤维类型组成的不同所致。从这些结果可以看出，肌肉疲劳对肌肉的激活模式和代谢产生了影响，尤其是股直肌，与其他伸膝运动相比，表现出了特异性的反应。而等长收缩(伸膝)间歇50次，休息3s，伸膝肌的肌电和肌电活动分别下降70%和50%。MMG的激活水平顺序为RF&lt；VL&Lt；VM。这种差异被认为是由于各肌群肌纤维类型组成的不同所致。这些结果表明，肌肉疲劳对肌肉激活模式和代谢的影响，特别是股直肌，与其他膝关节伸肌相比具有特异性反应。