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首页> 外文会议>International Congress on Image and Signal Processing, BioMedical Engineering and Informatics >Post-stroke asymmetry of muscle contractions for knee flexion and extension during walking
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Post-stroke asymmetry of muscle contractions for knee flexion and extension during walking

机译：脑卒中后肌肉收缩的不对称性，导致步行过程中膝盖的屈伸

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Patients with stroke usually have abnormal gait during walking. A hallmark of the post-stroke gait is the decreased knee flexion on the paretic leg compared to the non-paretic side. The objective of this study was to investigate the muscle contractions that are potentially responsible for the asymmetry of knee flexion in post-stroke patient. Ten stroke patients and 10 age- and sex-matched healthy controls were recruited. Kinematic signals were recorded using a motion analysis system by capturing the reflective markers attached on the both legs. Surface electromyography (sEMG) signals were collected using on the rectus femoris (RF) muscle, the biceps femoris (BF) muscle and the gastrocnemius (GAS) muscle. Asymmetry ratio of the knee angle range (KAR), as well as the root mean square error (RMSE) of the sEMG during knee joint flexion and extension within one gait cycle was calculated. We found that most patients were different from healthy subjects in the asymmetry ratio of KAR during flexion (p <; 0.05), and extension (p <; 0.01). The RMSE of the RF of non-paretic side in stroke patient was different from that of healthy control during extension (p <; 0.05). There were differences in RMSEs of the GAS of both sides between two groups during flexion in paretic side (p <; 0.05) and non-paretic side (p <; 0.05). Differences were found in RMSEs of GAS of both stroke (p <; 0.05) and control (p <; 0.05) between two sides during flexion. Comparing the gait symmetry and the situations of muscle contractions between people after stroke and healthy people could guide the clinical rehabilitation of stroke patients.
机译：中风患者通常在行走过程中步态异常。卒中后步态的标志是与非坐骨侧相比，坐骨腿的膝盖屈曲减少。这项研究的目的是研究可能导致卒中后患者膝关节屈曲不对称的肌肉收缩。招募了10名中风患者以及10名年龄和性别相匹配的健康对照。使用运动分析系统通过捕获两条腿上附着的反射标记来记录运动信号。在股直肌（RF）肌肉，股二头肌（BF）肌肉和腓肠肌（GAS）肌肉上收集表面肌电图（sEMG）信号。计算了一个步态周期内膝关节屈伸时sEMG的膝角范围（KAR）的不对称比以及sEMG的均方根误差（RMSE）。我们发现，大多数患者在屈曲（p <; 0.05）和伸展（p <; 0.01）期间KAR的不对称率与健康受试者不同。脑卒中患者非胃旁侧射频的RMSE与健康对照组在延展期不同（p <; 0.05）。在坐骨侧（p <; 0.05）和非坐骨侧（p <; 0.05）屈曲期间，两组之间的GAS的RMSE均存在差异。在屈曲过程中，两侧的卒中（p <; 0.05）和对照（p <; 0.05）的GAS的RMSE有差异。比较中风后人与健康人的步态对称性和肌肉收缩情况，可以指导中风患者的临床康复。

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