膝关节角度对等长次最大程度自主伸膝过程中股内侧肌和股外侧肌刚性的影响。

IF 2 4区 医学 Q3 NEUROSCIENCES Journal of Electromyography and Kinesiology Pub Date : 2023-09-21 DOI:10.1016/j.jelekin.2023.102826
Jérémie Bouvier , Augustin C. Ogier , Cyril Martin , Alexandre Fouré
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引用次数: 0

摘要

在自主收缩过程中使用剪切波弹性成像可以对激动肌之间的负荷分担策略进行非侵入性评估。然而,关节角度和自主收缩强度的变化可以改变肌肉之间的贡献。本研究的目的是通过剪切波弹性成像图研究等轴测亚最大自主收缩过程中膝关节角度对股内侧肌(VM)和股外侧肌(VL)局部力学性能的影响。在12名参与者的两个膝关节角度(50°和100°|膝盖完全伸展=0°)下,评估了静息时和恒定等长次最大自主收缩期间(即最大自主收缩[MVC]的25%、50%和75%)的VM和VL杨氏模量。在所有扭矩水平和膝关节角度之间,VM杨氏模量均无显著差异(p>0.05)。对于100°的膝关节角度,在25%MVC时的VL杨氏模量显著高于相同膝关节角度的75%MVC时,并且对于100°膝关节角度在25%MVC时大于50°(p
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Effect of knee joint angle on vastus medialis and vastus lateralis rigidity during isometric submaximal voluntary knee extensions

The use of shear wave elastography during voluntary contraction has enabled the non-invasive assessment of load sharing strategies between agonist muscles. However, the change in joint angle and voluntary contraction intensity can modify contribution between muscles. The aim of this study was to investigate the effect of knee joint angle on the local mechanical properties of the vastus medialis (VM) and the vastus lateralis (VL) during isometric submaximal voluntary contractions from shear wave elastography mapping. The VM and VL Young’s modulus at rest and during constant isometric submaximal voluntary contractions (i.e., 25%, 50% and 75% of maximal voluntary contraction [MVC]) were assessed for two knee angles (50° and 100° | knee fully extended = 0°) in twelve participants. No significant difference was found in the VM Young’s modulus among all torque levels and knee angles (p > 0.05). VL Young’s modulus was significantly higher at 25% MVC for a knee angle of 100° than at 75% MVC for the same knee angle and was greater at 25% MVC for a knee angle of 100° than for 50° (p < 0.05). In contrast to the VM, the contribution of the VL to the knee joint torque production during isometric voluntary contraction appears to depend on the muscle length and the relative knee extension torque level.

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来源期刊
CiteScore
4.70
自引率
8.00%
发文量
70
审稿时长
74 days
期刊介绍: Journal of Electromyography & Kinesiology is the primary source for outstanding original articles on the study of human movement from muscle contraction via its motor units and sensory system to integrated motion through mechanical and electrical detection techniques. As the official publication of the International Society of Electrophysiology and Kinesiology, the journal is dedicated to publishing the best work in all areas of electromyography and kinesiology, including: control of movement, muscle fatigue, muscle and nerve properties, joint biomechanics and electrical stimulation. Applications in rehabilitation, sports & exercise, motion analysis, ergonomics, alternative & complimentary medicine, measures of human performance and technical articles on electromyographic signal processing are welcome.
期刊最新文献
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