McMulkin Mark L, Gordon Andi B
Walter E. Griffin and Agnes M. Griffin Motion Analysis Laboratory, Shriners Hospitals for Children, Spokane, WA 99204, USA.
Gait Posture. 2009 Oct;30(3):375-8. doi: 10.1016/j.gaitpost.2009.06.010. Epub 2009 Jul 23.
A thigh wand affixed to the lateral and distal parts of the thigh has typically been used as part of the 3-D computerized gait analysis marker set and model to assess hip rotation in walking. A marker placed on the patella has been proposed as an alternative. The purpose of this study was two-fold. First, determine if the static standing hip posture affected kinematic gait data of hip rotation. Second, determine which marker within the configuration, (a thigh wand or patella marker) performed more consistently with the variation in static hip position. Ten adult subjects participated in this study. Three static trials were captured for each subject (typical hip rotation, internal hip rotation, external hip rotation) and processed twice; once using the thigh wand and a second time using the patella marker. The subject then walked typically with one trial randomly selected for analysis. When using a thigh wand, mean dynamic hip rotation determined in stance phase was significantly different (7 degrees internal to 17 degrees external) with the three static hip rotation variations. For the patella marker, there was no significant difference in gait hip rotation (7 degrees external) with the three static hip rotation postures. In conclusion, because gait hip rotation was more consistently determined with changes in standing static hip rotation postures, it is recommended that a marker on the patella be used in the conventional gait marker set in lieu of a thigh wand.
通常，附着在大腿外侧和远端的大腿棒被用作三维计算机步态分析标记集和模型的一部分，以评估步行时的髋关节旋转。有人提议将放置在髌骨上的标记作为一种替代方法。本研究有两个目的。第一，确定静态站立时的髋关节姿势是否会影响髋关节旋转的运动步态数据。第二，确定在该配置中（大腿棒或髌骨标记）哪个标记在静态髋关节位置变化时表现更一致。十名成年受试者参与了本研究。为每个受试者采集了三次静态试验（典型髋关节旋转、髋关节内旋、髋关节外旋）并进行了两次处理；一次使用大腿棒，第二次使用髌骨标记。然后受试者正常行走，随机选择一次试验进行分析。使用大腿棒时，在站立期确定的平均动态髋关节旋转在三种静态髋关节旋转变化时存在显著差异（从内旋7度到外旋17度）。对于髌骨标记，在三种静态髋关节旋转姿势下，步态髋关节旋转（外旋7度）没有显著差异。总之，由于步态髋关节旋转在站立静态髋关节旋转姿势变化时的测定更一致，因此建议在传统步态标记集中使用髌骨上的标记来代替大腿棒。
