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Abnormal Gait and Neuromuscular Dysfunction Analysis in Patients with Lumbar Disc Herniation

机译：腰椎椎间盘突出患者的异常步态和神经肌肉功能障碍分析

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The lumbar disc herniation (LDH) has become one of the most common orthopedic diseases. But the effects of LDH on the gait and neuromuscular activities have not been well understood. The purpose of this study was to examine the biomechanical and neuromuscular characteristics in LDH during walking. Sixteen patients with LDH and seven healthy subjects participated in the experiment. All the subjects were required to walk straight along a 5-meters line drawn on the ground at their usual speed. During walking, gait kinematic signals and surface electromyography (sEMG) signals were recorded simultaneously. Seven gait parameters (step length, stride length, step width, cadence, double support phase, single support phase and speed) were extracted for gait assessment. Root mean square (RMS) and median frequency (MDF) of the sEMG signals were extracted for evaluation of neuromuscular function. The bivariate correlation analysis was applied to examine the correlation between gait and muscle activation parameters. The patients with LDH showed decreased cadence, increased muscular activation and increased correlation between single support phase and muscle activation. The LDH can result in slower steps and increased muscle activation, indicating decreased gait flexibility and increased energy consumption in patients with LDH during walking. This study sheds light on the abnormal gait and neuromuscular dysfunction in the LDH patients. The methodology developed in this study may facilitate functional evaluation of LDH.
机译：腰椎间盘突出（LDH）已成为最常见的骨科疾病之一。但LDH对步态和神经肌肉活动的影响尚未得到很好的理解。本研究的目的是在步行期间检查LDH的生物力学和神经肌肉特征。 LDH和七名健康受试者的十六名患者参加了实验。所有这些受试者都被要求沿着在地面上绘制的5米线以其平时的速度行走。在步行期间，同时记录步态运动信号和表面电拍信号（SEMG）信号。提取七个步态参数（步长，步伐，步进宽度，凹陷，双支撑阶段，单次支持相和速度）以进行步态评估。提取SEMG信号的均方根（RMS）和中值（MDF）以评估神经肌肉功能。应用了双变量相关分析来检查步态和肌肉激活参数之间的相关性。 LDH患者表现出降低的焦点，肌肉激活增加，单个支持相和肌肉活化之间的相关性增加。 LDH可导致较慢的步骤和肌肉激活增加，表明步行期间LDH患者的步态灵活性降低和能耗增加。本研究揭示了LDH患者的异常步态和神经肌肉功能障碍。本研究开发的方法可以促进LDH的功能评估。

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