High muscle co-contraction does not result in high joint forces during gait in anterior cruciate ligament deficient knees.
High muscle co-contraction does not result in high joint forces during gait in anterior cruciate ligament deficient knees.
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高肌肉共同接收不会导致前交叉韧带缺乏膝盖的步态过程中的高关节力。
DOI：
10.1002/jor.24141
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发表时间：
2019-01
期刊：
影响因子：
--
通讯作者：
Buchanan TS
中科院分区：
文献类型：
--
作者：
Khandha A;Manal K;Capin J;Wellsandt E;Marmon A;Snyder-Mackler L;Buchanan TS
前交叉韧带损伤后发生膝骨关节炎的机制尚不清楚。本研究的目的是评估患有前交叉韧带缺陷的年轻受试者 (ACLD，n = 36) 与对照受试者 (n = 12) 的膝部步态变量、肌肉协同收缩指数和膝关节负荷。使用经过验证的肌电图模型来估计关节负荷。对于 ACLD 受试者的受累肢体，与对照组相比，内侧（p = 0.018，效应大小 = 0.93）和外侧（p = 0.028，效应大小 = 0.83）激动剂-拮抗肌对的肌肉协同收缩指数较高。尽管肌肉协同收缩较高，但与未受累肢体（平均差 = 0.39 体重，p = 0.009，效应大小 = 0.70）以及对照肢体（平均差 = 0.57 体重，p = 0.007，效应大小 = 1.14）相比，受累肢体的内侧间隔接触力较低。对于总接触力也进行了类似的观察。对于受累肢体与未受累肢体相比，ACLD 组在接受重量期间表现出较低的垂直地面反作用力（平均差 = 0.08 体重，p = 0.010，效应大小 = 0.70）和膝关节屈曲力矩（平均差 = 1.32% 体重 * 身高，p = 0.003，效应大小 = 0.76）。这些结果表明，高肌肉共同收缩并不总是导致高膝关节负荷，这被认为与膝骨关节炎有关。需要长期随访来评估非骨关节炎受试者与骨关节炎受试者的步态改变进展情况。
The mechanism of knee osteoarthritis development after anterior cruciate ligament injuries is poorly understood. The objective of this study was to evaluate knee gait variables, muscle co-contraction indices and knee joint loading in young subjects with anterior cruciate ligament deficiency (ACLD, n = 36), versus control subjects (n = 12). A validated, electromyography-informed model was used to estimate joint loading. For the involved limb of ACLD subjects versus control, muscle co-contraction indices were higher for the medial (p = 0.018, effect size = 0.93) and lateral (p = 0.028, effect size = 0.83) agonist-antagonist muscle pairs. Despite higher muscle co-contraction, medial compartment contact force was lower for the involved limb, compared to both the uninvolved limb (mean difference = 0.39 body weight, p = 0.009, effect size = 0.70) as well as the control limb (mean difference = 0.57 body weight, p = 0.007, effect size = 1.14). Similar observations were made for total contact force. For involved versus uninvolved limb, the ACLD group demonstrated lower vertical ground reaction force (mean difference = 0.08 body weight, p = 0.010, effect size = 0.70) and knee flexion moment (mean difference = 1.32% body weight * height, p = 0.003, effect size = 0.76), during weight acceptance. These results indicate that high muscle co-contraction does not always result in high knee joint loading, which is thought to be associated with knee osteoarthritis. Long-term follow-up is required to evaluate how gait alterations progress in non-osteoarthritic versus osteoarthritic subjects.
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影响因子：
4.8
作者：
Hurd, Wendy J.;Axe, Michael J.;Snyder-Mackler, Lynn
通讯作者：
Snyder-Mackler, Lynn
影响因子：
2.5
作者：
Hermens, HJ;Freriks, B;Rau, G
通讯作者：
Rau, G
DOI：
10.1097/01.bco.0000176423.07865.d2
发表时间：
2005-10-01
期刊：
Current opinion in orthopaedics
影响因子：
--
作者：
Fleming, Braden C;Hulstyn, Michael J;Fadale, Paul D
通讯作者：
Fadale, Paul D
影响因子：
7
作者：
Baliunas, AJ;Hurwitz, DE;Andriacchi, TP
通讯作者：
Andriacchi, TP
DOI：
10.1097/01.blo.0000197079.26600.09
发表时间：
2006-01-01
影响因子：
4.2
作者：
Andriacchi, Thomas P.;Briant, Paul L.;Koo, Seungbum
通讯作者：
Koo, Seungbum