Knee joint angle and vasti muscle electromyograms during fatiguing contractions
Knee joint angle and vasti muscle electromyograms during fatiguing contractions
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DOI：
10.1111/cpf.12372
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发表时间：
2018-07-01
影响因子：
1.8
通讯作者：
Akima, Hiroshi
中科院分区：
文献类型：
--
作者：
Ando, Ryosuke;Tomita, Aya;Akima, Hiroshi
我们比较了疲劳强直收缩时两种膝关节角度下的股骨头肌肌电图。在8名健康男性中，通过在60度（伸展，0度表示完全伸展）和110度（屈曲）的膝关节角度处电刺激股神经诱发膝伸肌强直收缩70 s。记录股中间肌（VI）、股外侧肌（VL）和股内侧肌（VM）的表面肌电图。每7 s计算一次膝关节伸展力和M波振幅和持续时间，并按初始值进行标准化。膝关节屈曲角度时的标准伸膝力较伸膝角度时降低（P
We compared vasti muscle electromyograms for two knee joint angles during fatiguing tetanic contractions. Tetanic contraction of the knee extensors was evoked for 70 s by electrical stimulation of the femoral nerve at knee joint angles of 60 degrees (extended, with 0 degrees indicating full extension) and 110 degrees (flexed) in eight healthy men. Surface electromyography was recorded from the vastus intermedius (VI), vastus lateralis (VL) and vastus medialis (VM) muscles. Knee extension force and M-wave amplitudes and durations were calculated every 7 s, which were normalized by the initial value. Normalized knee extension force was decreased at the flexed knee joint angle compared with that of the extended knee joint angle (P