Sonomyographic responses during voluntary isometric ramp contraction of the human rectus femoris muscle.
Sonomyographic responses during voluntary isometric ramp contraction of the human rectus femoris muscle.
复制标题
人类股直肌自愿等长斜坡收缩期间的声肌图反应
DOI：
10.1007/s00421-011-2227-2
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发表时间：
2012-07
影响因子：
3
通讯作者：
Zhang, Zhiguo
中科院分区：
文献类型：
--
作者：
Chen, Xin;Zheng, Yong-Ping;Guo, Jing-Yi;Zhu, Zhenyu;Chan, Shing-Chow;Zhang, Zhiguo
关键词：
本文旨在研究在股直肌（RF）肌肉等距斜面收缩过程中，扭矩与肌肉形态变化之间的关系，并进一步将SMG与肌电图（EMG）和肌力图（MMG）进行比较，后者代表了肌肉的电和机械活动。9名受试者分别以45、22.5和15% MVC/s的速度进行最大自主收缩（MVC）的90%的等距斜面收缩，同时记录射频肌肌电图、MMG和超声图。采用新开发的图像跟踪算法，从连续捕获的超声图像中自动提取横截面积（SMG）。采用多项式回归分析拟合EMG/MMG/SMG-扭矩关系，比较EMG、MMG和SMG的回归系数。此外，通过两两比较不同速度下肌电信号、MMG和SMG的平均关系曲线，检验收缩速度对SMG/EMG/MMG-扭矩关系的影响。结果表明，连续肌电信号可以为连续肌肉收缩提供重要的形态学参数。与肌电和肌电相比，自主等距斜面收缩过程中，肌电随转矩的增加呈现不同的变化规律，受收缩速度的影响较小。
This paper aims to investigate the relationship between torque and muscle morphological change, which is derived from ultrasound image sequence and termed as sonomyography (SMG), during isometric ramp contraction of the rectus femoris (RF) muscle, and to further compare SMG with the electromyography (EMG) and mechanomyography (MMG), which represent the electrical and mechanical activities of the muscle. Nine subjects performed isometric ramp contraction of knee up to 90% of the maximal voluntary contraction (MVC) at speeds of 45, 22.5 and 15% MVC/s, and EMG, MMG and ultrasonography were simultaneously recorded from the RF muscle. Cross-sectional area, which was referred to as SMG, was automatically extracted from continuously captured ultrasound images using a newly developed image tracking algorithm. Polynomial regression analyses were applied to fit the EMG/MMG/SMG-to-torque relationships, and the regression coefficients of EMG, MMG, and SMG were compared. Moreover, the effect of contraction speed on SMG/EMG/MMG-to-torque relationships was tested by pair-wise comparisons of the mean relationship curves at different speeds for EMG, MMG and SMG. The results show that continuous SMG could provide important morphological parameters of continuous muscle contraction. Compared with EMG and MMG, SMG exhibits different changing patterns with the increase of torque during voluntary isometric ramp contraction, and it is less influenced by the contraction speed.
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DOI：
10.1023/b:visi.0000029664.99615.94
发表时间：
2004-11-01
影响因子：
19.5
作者：
Lowe, DG
通讯作者：
Lowe, DG
影响因子：
3
作者：
Beck, TW;Housh, TJ;Malek, MH
通讯作者：
Malek, MH
影响因子：
2.5
作者：
Ryan, Eric D.;Cramer, Joel T.;Herda, Trent J.
通讯作者：
Herda, Trent J.
影响因子：
2.5
作者：
Pincivero, DM;Coelho, AJ;Suter, E
通讯作者：
Suter, E
影响因子：
5.5
作者：
Aagaard, P;Andersen, JL;Simonsen, EB
通讯作者：
Simonsen, EB