不同坡度下身体平衡与下肢关节的生物力学分析

发布时间：2018-02-20 14:51

本文关键词： 星型偏移平衡测试坡度曲度　出处：《宁波大学》2017年硕士论文　论文类型：学位论文

【摘要】：研究目的:本实验研究通过检测受试者不同坡度下的身体平衡状态,分析坡度的改变对于下肢髋、膝、踝关节平衡能力的生物力学影响,并将曲度这一测量指标应用于对下肢各关节活动情况的评判与量化。研究方法:选取20名健康年轻男性参与测试。使用六自由度平台(直径2m)作为运动模拟平台,设置4种坡度:-5°,0°,5°,10°。通过在不同倾斜角度下进行星型偏移平衡测试,使用Vicon三维运动捕捉系统采集时空参数与下肢相关标志点三维坐标数据来计算星型偏移平衡测试结果与曲度。研究结果:在正前方向上,当坡度为负值时星型偏移平衡测试结果与平地相比显著性增加(p0.05);当坡度为正值时,髋关节和膝关节的曲度随着坡度增加而显著性增加(p0.05),坡度为负值时,膝关节的曲度与平地相比显著性增加(p0.05)。曲度相比于星型平衡测试仅用伸展距离评估平衡能力,能够更好的反应不同坡度下下肢关节所出现的差异。研究结论:当坡度为正值时,倾斜角度对机体平衡的影响不大,但髋关节及膝关节曲度随倾斜角的增加而增大;当坡度为负值时,机体的平衡能力相对于无坡度是明显降低,同时膝关节曲度较无坡度时显著增加。负倾斜角状态相比于正倾斜角更易失去平衡。同时膝关节与踝关节在不同坡度下变化幅度较大,应当注意保护。曲度作为一种新型运动轨迹评估指标,可以有效准确的反应并未被发现的关节活动变化,具有广阔的应用前景。
[Abstract]:Objective: to study the biomechanical effects of the slope change on the balance ability of the hip, knee and ankle joints of the lower extremities by measuring the body balance state of the subjects at different slopes, and to analyze the effects of the slope changes on the balance ability of the hip, knee and ankle joints. The measurement index of curvature was applied to the evaluation and quantification of the movement of lower extremity joints. Methods: 20 healthy young men were selected to participate in the test. Six degrees of freedom platform (diameter 2 m) was used as the motion simulation platform. Four kinds of slopes were set up: 1: -5 掳/ 0 掳/ 5 掳/ 10 掳. The star migration balance was measured at different tilt angles. Using Vicon three-dimensional motion capture system to collect the data of space-time parameters and lower extremity related markers to calculate the star migration balance test results and curvature. When the slope is negative, the results of star offset balance test are significantly increased compared with the flat land, and when the slope is positive, the curvature of hip joint and knee joint increases significantly with the increase of slope, and when the slope is negative, the curvature of hip joint and knee joint increases significantly with the increase of slope, and when the slope is negative, the curvature of hip joint and knee joint increases significantly with the increase of slope. Compared with the star balance test, the curvature of the knee joint increased significantly compared with the flat ground. Compared with the star balance test, the curvature could better reflect the differences of the lower extremity joints at different slopes compared with the star balance test with only stretching distance. Conclusion: when the slope is positive, The inclination angle had little effect on the balance of the body, but the curvature of the hip joint and knee joint increased with the increase of the tilt angle, and when the slope was negative, the balance ability of the body was significantly lower than that of the non-slope. At the same time, the curvature of knee joint was significantly increased compared with that of no slope. The negative angle was more easily out of balance than that of the positive angle. At the same time, the knee joint and ankle joint changed greatly at different slopes. As a new type of motion trajectory evaluation index, curvature can effectively and accurately respond to the undiscovered changes of joint motion, and has a broad application prospect.
【学位授予单位】：宁波大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：G804.6

【相似文献】