Assessment of the functional method of hip joint center location subject to reduced range of hip motion
Assessment of the functional method of hip joint center location subject to reduced range of hip motion
复制标题
DOI：
10.1016/s0021-9290(03)00288-4
复制
发表时间：
2004-03-01
影响因子：
2.4
通讯作者：
Cavanagh, PR
中科院分区：
文献类型：
--
作者：
Piazza, SJ;Erdemir, A;Cavanagh, PR
下肢的运动分析通常需要确定髋关节中心的位置。最近的几项研究结果表明，根据运动分析数据计算出的运动学和动力学变量对髋关节中心位置的误差高度敏感。 “功能”方法是根据大腿和骨盆的相对运动来确定髋关节中心的位置，而不是根据骨标志的位置来确定，这种方法很有前途，但当运动受到限制时可能会无效。本研究的目的是确定当对髋关节运动施加限制时，年轻和老年受试者的功能方法的准确性是否会受到影响，并调查使用在常见研究的运动（步行、坐站、上楼梯、下楼梯）期间收集的数据来定位髋关节中心的可能性，而不是使用来自进行不同髋关节运动的临时试验的数据。研究结果表明，当可用的髋关节运动受到严重限制时，功能方法将导致最坏情况下的髋关节中心定位误差为 26 毫米（与之前报告的基于骨标志的关节中心定位的平均误差相比）。然而，当根据常用运动期间收集的数据定位髋关节中心时，会产生更大的误差（类似于 70 毫米最坏情况），这可能是因为这些运动在很大程度上仅限于矢状面。看来，当运动范围有限时，功能方法可以成功实施，但仍然需要收集特殊的运动试验，其中记录矢状面和额状面的髋部运动。 (C) 2003 Elsevier Ltd. 保留所有权利。
Motion analysis of the lower extremities usually requires determination of the location of the hip joint center. The results of several recent studies have suggested that kinematic and kinetic variables calculated from motion analysis data are highly sensitive to errors in hip joint center location. "Functional" methods in which the location of the hip joint center is determined from the relative motion of the thigh and pelvis, rather than from the locations of bony landmarks, are promising but may be ineffective when motion is limited. The aims of the present study were to determine whether the accuracy of the functional method is compromised in young and elderly subjects when limitations on hip motion are imposed and to investigate the possibility of locating the hip joint center using data collected during commonly studied motions (walking, sit-to-stand, stair ascent, stair descent) rather than using data from an ad hoc trial in which varied hip motions are performed. The results of the study suggested that functional methods would result in worst-case hip joint center location errors of 26 mm (comparable to the average errors previously reported for joint center location based on bony landmarks) when available hip motion is substantially limited. Much larger errors (similar to 70 mm worst-case), however, resulted when hip joint centers were located from data collected during commonly performed motions, perhaps because these motions are, for the most part, restricted to the sagittal plane. It appears that the functional method can be successfully implemented when range of motion is limited but still requires collection of a special motion trial in which hip motion in both the sagittal and frontal planes is recorded. (C) 2003 Elsevier Ltd. All rights reserved.