Gait Laboratory, Central Remedial Clinic, Clontarf, Dublin 3, Ireland; Trinity Centre for Bioengineering, Parsons Building, Trinity College Dublin, Dublin 2, Ireland.
Gait Laboratory, Central Remedial Clinic, Clontarf, Dublin 3, Ireland.
J Biomech. 2014 Jan 3;47(1):284-8. doi: 10.1016/j.jbiomech.2013.10.024. Epub 2013 Oct 23.
Inverse Dynamic calculations are routinely used in joint moment and power estimates during gait with anthropometric data often taken from published sources. Many biomechanical analyses have highlighted the need to obtain subject-specific anthropometric data (e.g. Mass, Centre of Mass, Moments of Inertia) yet the types of imaging techniques required to achieve this are not always available in the clinical setting. Differences in anthropometric sets have been shown to affect the reactive force and moment calculations in normal subjects but the effect on a paediatric diplegic cerebral palsy group has not been investigated. The aim of this study was to investigate the effect of using different anthropometric sets on predicted sagittal plane moments during normal and diplegic cerebral palsy gait. Three published anthropometric sets were applied to the reactive force and moment calculations of 14 Cerebral Palsy and 14 Control subjects. Statistically significant differences were found when comparing the different anthropometric sets but variability in the resulting sagittal plane moment calculations between sets was low (0.01-0.07 Nm/kg). In addition, the GDI-Kinetic, used as an outcome variable to assess whether differences were clinically meaningful, indicated no clinically meaningful difference between sets. The results suggest that the effects of using different anthropometric sets on the kinetic profiles of normal and diplegic cerebral palsy subjects are clinically insignificant.
反向动力学计算常用于步态中的关节力矩和功率估计，人体测量学数据通常来自已发表的来源。许多生物力学分析都强调需要获得特定于受试者的人体测量学数据（例如质量、质心、惯性矩），但在临床环境中并非总是能够获得实现这一目标所需的成像技术。已经表明，人体测量学数据集的差异会影响正常受试者的反作用力和力矩计算，但尚未研究其对小儿脑瘫双瘫组的影响。本研究旨在探讨在正常和脑瘫双瘫步态中使用不同人体测量数据集对预测矢状面力矩的影响。将三个已发表的人体测量数据集应用于 14 名脑瘫患者和 14 名对照受试者的反作用力和力矩计算。在比较不同人体测量数据集时发现了统计学上的显著差异，但数据集之间的矢状面力矩计算的变异性较低（0.01-0.07 Nm/kg）。此外，作为评估差异是否具有临床意义的结果变量的 GDI-Kinetic 表明，各数据集之间没有临床意义上的差异。结果表明，在正常和脑瘫双瘫受试者的动力学特征中使用不同人体测量数据集的影响在临床上是微不足道的。
