偏瘫患者步态特征的动力学仿真分析

发布时间：2018-03-13 05:21

本文选题：偏瘫步态　切入点：LifeMOD软件　出处：《医用生物力学》2017年06期 　论文类型：期刊论文

【摘要】：目的研究偏瘫步态特征与下肢异常肌力之间的内在关系,阐明导致偏瘫步态的肌力原因并为临床治疗提供建议。方法以偏瘫步态和正常步态为研究对象进行建模仿真,通过正常步态下仿真模型与实测数据对比验证模型有效性,对两种模型的运动学数据、地面反作用力(ground reaction force,GRF)及肌力等特征曲线进行差异分析。结果 LifeMOD仿真结果与测力台实测GRF曲线复相关系数为0.922,动力学模型合理有效。偏瘫步态患者初始着地期胫前肌肌力小导致踝关节背屈不足,摆动前期腓肠肌肌力小,起不到蹬离推动作用。结论胫前肌、腓肠肌软弱无力是偏瘫患者出现足下垂等偏瘫步态特征的主要原因,LifeMOD建模仿真可协助诊断偏瘫患者的异常肌力。
[Abstract]:Objective to study the relationship between the characteristics of hemiplegic gait and the abnormal muscle strength of lower extremity, to elucidate the causes of muscle strength of hemiplegic gait and to provide suggestions for clinical treatment. Methods Hemiplegic gait and normal gait were used as research objects for modeling and simulation. The simulation model under normal gait is compared with the measured data to verify the validity of the model, and the kinematics data of the two models are analyzed. The differences between ground reaction force GRFs and muscle strength curves were analyzed. Results the complex correlation coefficient between the LifeMOD simulation results and the measured GRF curve was 0.922, and the dynamic model was reasonable and effective. The tibia of the patients with hemiplegic gait at the initial landing stage was reasonable and effective. The small muscle strength of the anterior muscle leads to the deficiency of ankle dorsiflexion. Conclusion the weakness of anterior tibial muscle and gastrocnemius muscle is the main cause of gait characteristics of hemiplegia in hemiplegic patients. LifeMOD modeling and simulation can help to diagnose abnormal muscle strength of hemiplegic patients.
【作者单位】：东南大学土木工程学院;南京体育学院科研处;南京体育学院健康系;
【基金】：国家自然科学基金项目(31270998)
【分类号】：R318.01;R743.3

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