School of Rehabilitation, Université de Montréal, Montreal, Canada(1); Pathokinesiology Laboratory, Centre for Interdisciplinary Research in Rehabilitation of Greater Montreal, Institut de réadaptation Gingras-Lindsay de Montréal, Montreal, Canada(2).
School of Rehabilitation, Université de Montréal, Montreal, Canada(1); Pathokinesiology Laboratory, Centre for Interdisciplinary Research in Rehabilitation of Greater Montreal, Institut de réadaptation Gingras-Lindsay de Montréal, Montreal, Canada(2).
J Electromyogr Kinesiol. 2014 Oct;24(5):739-46. doi: 10.1016/j.jelekin.2014.04.013. Epub 2014 May 14.
The purpose of this study was to characterize balance in individuals with and without an incomplete spinal cord injury (ISCI) during the single support phase of gait. Thirty-four individuals (17 with a ISCI, 17 able-bodied) walked at their self-selected walking speed. Among those, eighteen individuals (9 with ISCI, 9 able-bodied) with a similar walking speed were also analyzed. Stabilizing and destabilizing forces quantified balance during the single support phase of gait. The biomechanical factors included in the equation of the stabilizing and destabilizing forces served as explanatory factors. Individuals with ISCI had a lower stabilizing force and a higher destabilizing force compared to able-bodied individuals. The main explanatory factors of the forces extracted from the equations were the speed of the center of mass (maximal stabilizing force) and the distance between the center of pressure and the base of support (minimal destabilizing force). Only the minimal destabilizing force was significantly different among subgroups with a similar walking speed. The stabilizing and destabilizing forces suggest that individuals with ISCI were more stable than able-bodied, which was achieved by walking more slowly - which decrease the speed of the center of mass - and keeping the center of pressure away from the margin of the base of support in order to maintain balance within their range of physical ability.
本研究旨在描述完全性脊髓损伤（ISCI）患者和非 ISCI 患者在步态单支撑相时的平衡特征。34 名个体（17 名 ISCI 患者，17 名非 ISCI 个体）以自我选择的步行速度行走。其中，18 名具有相似步行速度的个体（9 名 ISCI 患者，9 名非 ISCI 个体）也进行了分析。在步态单支撑相期间，稳定和不稳定力量化了平衡。该方程中的生物力学因素被用作解释因素。与非 ISCI 个体相比，ISCI 患者的稳定力较低，不稳定力较高。从方程中提取的力的主要解释因素是质心速度（最大稳定力）和压力中心与支撑基础之间的距离（最小不稳定力）。只有最小不稳定力在具有相似步行速度的亚组之间存在显著差异。稳定力和不稳定力表明，ISCI 患者比非 ISCI 患者更稳定，这是通过更慢的行走速度实现的，从而降低了质心速度，并使压力中心远离支撑基础的边缘，以在其身体能力范围内保持平衡。
