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首页> 外文期刊>Journal of Clinical and Diagnostic Research >Muscle Activation Profiles and Co-Activation of Quadriceps and Hamstring Muscles around Knee Joint in Indian Primary Osteoarthritis Knee Patients RC09-RC14
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Muscle Activation Profiles and Co-Activation of Quadriceps and Hamstring Muscles around Knee Joint in Indian Primary Osteoarthritis Knee Patients RC09-RC14

机译：印度原发性骨关节炎膝盖患者RC09-RC14的膝关节周围的股四头肌和Ham绳肌的肌肉激活特征和共同激活

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Introduction: Osteoarthritis (OA) of knee is a common joint disease. It is associated with reduced knee joint stability due to impaired quadriceps strength, pain, and an altered joint structure. There is altered muscle activation in knee OA patients, which interferes with normal load distribution around the knee and facilitates disease progression.Aim: Our primary aim was to determine activation patterns of the muscles i.e., quadriceps and hamstrings in knee OA patients during walking. We also studied co-activation of muscles around knee joint in primary OA knee patients including directed medial and lateral co-contractions.Materials and Methods: This observational study was done at Department of Physical Medicine and Rehabilitation, All India Institute of Medical Sciences, New Delhi, India. Forty-four patients with medial compartment primary knee OA were included in study after satisfying inclusion and exclusion criteria. All the patients were assessed for mean, peak and integrated Root Mean Square (RMS), EMG values, muscle activation patterns and co-activation of muscles around knee joint by surface Electromyography (EMG) analysis of Vastus Medialis Obliques (VMO), Vastus Lateralis (VL), Semitendinosus (SMT) and Biceps Femoris (BF) muscles during gait cycle. The EMG waveform for each muscle was amplitude normalized and time normalized to 100% of gait cycle and plotted on graph. Quantitative variables were assessed for normal distribution and accordingly mean±SD or median (range), as appropriate, was computed.Results: For primary OA knee, mean age 61±5 years, mean weight 63.7±10.1 kg, mean height 153.9±7.2 cm, and mean Body Mass Index (BMI) 26.8±3.0 kg/m2 was found. The muscle activity of hamstrings (SMT muscle and BF) was increased during midstance, late stance and early swing phase of gait cycle as compared to quadriceps (VMO and VL) muscle activity respectively, suggesting co-contraction of opposing muscles around knee joint.Conclusion: Patients with knee OA walk with increased hamstring muscle activity (during late stance and early swing phase) and reduced quadriceps recruitment. Altered neuro-muscular control around knee interferes with normal load distribution and facilitates disease progression in knee joint.
机译：简介：膝骨关节炎（OA）是一种常见的关节疾病。由于股四头肌力量受损，疼痛和关节结构改变，膝关节稳定性降低。膝OA患者的肌肉激活发生改变，这会干扰膝盖周围的正常负荷分布并促进疾病进展。目的：我们的主要目的是确定步行OA膝患者的肌肉激活模式，即股四头肌和绳肌。我们还研究了原发性OA膝关节患者膝关节周围肌肉的共激活，包括定向的内侧和外侧共收缩。材料与方法：这项观察性研究是在新印度全印度医学科学研究所物理医学与康复系完成的印度德里。在满足纳入和排除标准后，将44例内侧房室原发性膝骨关节炎患者纳入研究。通过表面内侧肌电图（EMG）分析内侧斜肌（VMO），外侧肌（Vastus （VL），半腱肌（S​​MT）和股二头肌（BF）的步态周期。将每个肌肉的EMG波形进行幅度归一化，并将时间归一化为步态周期的100％，并绘制在图表上。评估定量变量的正态分布，并相应地计算平均值±SD或中位数（范围）。结果：对于原发性OA膝，平均年龄61±5岁，平均体重63.7±10.1 kg，平均身高153.9±7.2厘米，平均体重指数（BMI）为26.8±3.0 kg / m2。与四头肌（VMO和VL）的肌肉活动相比，步态周期的中间，后期和早期摆动阶段的绳肌（SMT肌肉和BF）的肌肉活动增加，表明膝关节周围相对的肌肉共收缩。 ：膝骨关节炎患者走路时绳肌活动增加（在后期站立和早期摆动阶段），而股四头肌的吸收减少。膝盖周围神经肌肉控制的改变会干扰正常的负荷分配，并促进膝关节疾病的进展。

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