Relationship between shear elastic modulus and passive muscle force: An ex-vivo study
Relationship between shear elastic modulus and passive muscle force: An ex-vivo study
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DOI：
10.1016/j.jbiomech.2013.05.016
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发表时间：
2013-08-01
影响因子：
2.4
通讯作者：
Parker, Kevin J.
中科院分区：
文献类型：
--
作者：
Koo, Terry K.;Guo, Jing-Yi;Parker, Kevin J.
当肌肉被拉伸时，它的反应是增加被动阻力。这种被动力分量对于正常的肌肉功能是重要的。不幸的是，被动肌力的直接测量仍然超出了目前的国家的最先进的。本研究旨在探讨使用超声剪切波弹性成像（SSWE）间接测量被动肌力的可行性。从10只新鲜的烤鸡上解剖了16条胃外侧部和16条胫前肌。对于每个肌肉标本，近端骨-肌腱连接保持完整，胫骨或股骨夹在夹具中。通过滑轮系统将校准重量（0-400 g，每次增量25 g）应用于远端肌腱，同时使用SSWE测量肌肉弹性。重复测量3个循环。通过将最小二乘回归线拟合到数据来分析每个负载循环的每个测试肌肉的弹性-负载关系。重测信度采用组内相关系数（ICC）进行评价。结果表明，SSWE弹性和被动肌肉力量之间的关系是高度线性的所有测试肌肉的决定系数在0.971和0.999之间。回归线斜率和y轴截距参数的ICC分别为0.996和0.985，表明可靠性极佳。这些研究结果表明，SSWE，仔细应用时，可以是一个高度可靠的技术，肌肉弹性测量。SSWE弹性和被动肌力之间的线性关系表明，SSWE可以作为被动肌力的间接测量。(C)2013爱思唯尔有限公司保留所有权利。
As muscle is stretched, it reacts with increasing passive resistance. This passive force component is important for normal muscle function. Unfortunately, direct measurement of passive muscle force is still beyond the current state-of-the-art. This study aimed to investigate the feasibility of using Supersonic shear wave elastography (SSWE) to indirectly measure passive muscle force. Sixteen gastronomies pars externus and 16 tibialis anterior muscles were dissected from 10 fresh roaster chickens. For each muscle specimen, the proximal bone-tendon junction was kept intact with its tibia or femur clamped in a fixture. Calibration weights (0-400 g in 25 g per increment) were applied to the distal tendon via a pulley system and muscle elasticity was measured simultaneously using SSWE. The measurements were repeated for 3 cycles. The elasticity-load relationship of each tested muscle for each loading cycle was analyzed by fitting a least-squares regression line to the data. Test-retest reliability was evaluated using intraclass correlation coefficient (ICC). Results demonstrated that the relationships between SSWE elasticity and passive muscle force were highly linear for all the tested muscles with coefficients of determination ranging between 0.971 and 0.999. ICCs were 0.996 and 0.985, respectively, for the slope and y-intercept parameters of the regression lines, indicating excellent reliability. These findings indicate that SSWE, when carefully applied, can be a highly reliable technique for muscle elasticity measurements. The linear relationship between SSWE elasticity and passive muscle force identified in the present study demonstrated that SSWE may be used as an indirect measure of passive muscle force. (C) 2013 Elsevier Ltd. All rights reserved.