EMG-ANGLE RELATIONSHIP DURING MAXIMUM VOLUNTARY MOVEMENT
EMG-ANGLE RELATIONSHIP DURING MAXIMUM VOLUNTARY MOVEMENT
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最大自主运动期间的肌电角度关系
DOI：
10.7600/jspfsm1949.48.485
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发表时间：
1999
影响因子：
--
通讯作者：
Y. Handa
中科院分区：
文献类型：
--
作者：
H. Onishi;R. Yagi;M. Oyama;K. Ihashi;Y. Handa
本研究旨在探讨人体膝关节及腘绳肌的肌电活动与关节角度的关系。10名健康男性参与了本研究。他们在手术台上俯卧位，在0·K至120·K的屈曲角度范围内进行最大自主等速膝关节屈曲。采用双极细丝电极检测股二头肌半腱肌、半膜肌、长头和短头肌的肌电活动，并在0·K ~ 120·K的屈膝范围内以15·K的间隔积分。三个月后，对相同的受试者进行相同的检查，以确认本研究的可靠性。结果表明，膝关节屈曲角度为15·K ~ 45·K时，平均等速力矩达到峰值。腘绳肌的肌电活动随膝关节屈曲角度的变化而变化。随着膝关节屈曲角度从0·K增加到105·K，股二头肌半腱肌、半膜肌和短头肌的综合肌电逐渐增加。在两个试验中，这三块肌肉的峰积分EMG在90·K和105·K膝关节屈曲之间达到。而股二头肌长头肌在膝关节角度为15·K ~ 30·K时，肌电积分峰值最大。在两项试验中，当膝关节屈曲角度增加时，峰值积分EMG降低。这些结果表明，在最大随意运动时，激动肌的肌电活动随肌肉长度或关节角度的变化而变化。因此，认为关节扭矩和关节角度之间的关系不仅受到肌节长度和力臂的影响，而且还受到激动肌的肌肉活动的影响，即使运动是以最大的努力进行的。（Jpn. J. Phys. Fitness Sports Med. 1999，48：485·`492）关键词：钢丝肌电、腘绳肌、膝关节屈曲力矩、膝关节角度、最大等速运动
The purpose of this study is to investigate the relationship between joint angle and EMG activity concerning the human knee joint and hamstring muscles. Ten healthy males participated in this study. They performed maximum voluntary isokinetic knee flexion in the flexion angle range of 0•K to 120•K in a prone position on a table. The EMG activities of the semitendinosus, semimembranosus, long and short heads of the biceps femoris muscles were detected by bipolar fine wire electrode, and were integrated at knee flexion range intervals of 15•K from 0•K to 120•K. After three months, the same examination was performed with the same subjects to confirm the reliability of this study. Results showed the mean peak isokinetic torque was attained from a 15•K to 45•K knee flexion angle. The EMG activities of the hamstring muscles varied with changes in the knee flexion angle. The integrated EMG of the semitendinosus, semimembranosus and short head of the biceps femoris muscles increased gradually as the knee flexion angle was increased from 0•K to 105•K. The peak integrated EMG of these three muscles was attained between 90•K and 105•K knee flexion in both trials. On the other hand, the peak integrated EMG of the long head of the biceps femoris muscle was largest at a knee angle ranging from 15•K to 30•K. Peak integrated EMG decreased when the knee flexion angle increased in both trials. These results show that the electromyographic activity of agonist muscles during maximum voluntary movement varied with the change of muscle length or joint angle. Therefore, it was considered that the relationship between joint torque and joint angle is influenced not only by the sarcomere length and the moment arm but also muscle activities of agonist muscles, even if the movement is performed with maximum effort. (Jpn. J. Phys. Fitness Sports Med. 1999, 48 : 485•`492) key words : wire EMG, hamstrings, knee flexion torque, knee angle, maximum isokinetic movement
肌肉力量和力臂对青蛙后肢扭矩产生的贡献。
DOI：
10.1152/ajpcell.1988.254.6.c769
发表时间：
1988
期刊：
The American journal of physiology
影响因子：
--
作者：
Lieber,RL;Boakes,JL
通讯作者：
Boakes,JL
DOI：
10.1097/00003086-198310000-00042
发表时间：
1983-01-01
影响因子：
4.2
作者：
WICKIEWICZ, TL;ROY, RR;EDGERTON, VR
通讯作者：
EDGERTON, VR