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首页> 外文期刊>Gait & posture >Stride-to-stride variability of knee motion in patients with knee osteoarthritis.
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Stride-to-stride variability of knee motion in patients with knee osteoarthritis.

机译：膝关节骨关节炎患者膝关节运动的跨步变化。

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PURPOSE: Individuals with knee osteoarthritis (OA) experience pain, frontal plane joint laxity and instability. Co-contraction can control laxity and instability but may place constraints on the variability of the knee's motion during gait. Slight variation among gait cycles is normal, but reduced variability of joint motions could be detrimental. The purpose of this study was to quantify knee motion variability during gait and assess the influence of muscle activity, frontal plane laxity, and pain on knee movement variability in patients with medial knee OA. METHODS: Fifteen subjects with unilateral medial knee OA and 15 age and gender matched uninjured subjects underwent gait analysis, with electromyography to compute co-contraction. Stress radiographs were obtained for measuring frontal plane laxity. Knee motion variability was assessed from the phase angle (knee angle versus angular velocity) during early stance. RESULTS: Despite altered involved side knee kinematics and kinetics, individuals with knee OA showed involved side frontal plane variability which was not significantly different from the control group, but was significantly lower than the variability of the uninvolved knee's motion. Laxity and medial co-contraction influenced the amount of joint motion variability in the involved knee of the OA subjects. Pain did not influence variability. CONCLUSION: Patients with medial knee OA displayed altered involved knee kinematics and kinetics, although stride-to-stride variability of knee motion was unchanged. Evidence of excessive joint motion variability on the uninvolved side, however, may provide insight into the development of OA in the contralateral cognate joint.
机译：目的：膝骨关节炎（OA）患者会感到疼痛，额叶关节松弛和不稳定。共收缩可以控制松弛和不稳定性，但可能会限制步态中膝盖运动的可变性。步态周期之间的轻微变化是正常现象，但是关节运动的变化性降低可能是有害的。这项研究的目的是量化步态中膝关节运动的变异性，并评估肌肉活动，额叶松弛和疼痛对内侧膝关节炎患者膝关节运动变异性的影响。方法：对15名单侧内侧膝OA和15名年龄和性别相匹配的未受伤受试者进行步态分析，并通过肌电图计算共收缩。获得应力射线照相以测量额平面松弛度。从早期姿势期间的相角（膝盖角度与角速度）评估膝盖的运动变异性。结果：尽管患侧膝关节运动学和动力学发生了变化，但膝骨关节炎患者表现出患侧额叶平面变异性，与对照组无显着差异，但显着低于未受累膝关节运动的变异性。松弛和内侧共收缩影响了OA受试者受累膝关节的关节运动变异性。疼痛不影响变异性。结论：尽管膝关节运动的步幅变化没有变化，但内侧膝骨关节炎患者的膝关节运动学和动力学变化有所改变。然而，未受累侧关节运动变异性过多的证据可能提供对侧对侧同位关节骨关节炎发展的见识。

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