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首页> 外文期刊>Journal of Biomechanics >Ground reaction forces and lower-limb joint kinetics of turning gait in typically developing children
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Ground reaction forces and lower-limb joint kinetics of turning gait in typically developing children

机译：典型中养育儿童的地面反作用力和转动步态的下肢关节动力学

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Turning is a common locomotor task essential to daily activity; however, very little is known about the forces and moments responsible for the kinematic adaptations occurring relative to straight-line gait in typically developing children. Thus, the aims of this study were to analyse ground reaction forces (GRFs), ground reaction free vertical torque (T-Z), and the lower-limb joint kinetics of 90 degrees outside (step) and inside (spin) limb turns. Step, spin, and straight walking trials from fifty-four typically developing children were analysed. All children were fit with the Plug-in Gait and Oxford Foot Model marker sets while walking over force plates embedded in the walkway. Net internal joint moments and power were computed via a standard inverse dynamics approach. All dependent variables were statistically analysed over the entire curves using the mean difference 95% bootstrap confidence band approach. GRFs were directed medially for step turns and laterally for spin turns during the turning phase. Directions were reversed and magnitudes decreased during the approach phase. Step turns showed reduced ankle power generation, while spin turns showed large Tz. Both strategies required large knee and hip coronal and transverse plane moments during swing. These kinetic differences highlight adaptations required to maintain stability and reorient the body towards the new walking direction during turning: From a clinical perspective, turning gait may better reveal weaknesses and motor control deficits than straight walking in pathological populations, such as children with cerebral palsy, and could potentially be implemented in standard gait analysis sessions. (C) 2014 Elsevier Ltd. All rights reserved.
机译：转弯是日常活动至关重要的共同运动任务;然而，非常少于关于在通常在典型的发展儿童中发生相对于直线步态的运动适应的力和时刻所知的力和时刻。因此，本研究的目的是分析地面反作用力（GRF），接地反应自由垂直扭矩（T-Z），以及90度外部（步骤）和内部（旋转）肢体转动的下肢关节动力学。分析了五十四个典型发展儿童的步骤，旋转和直接步行试验。所有儿童都适合插入式步态和牛津脚模型标记集，同时行走在走道中的强制板上。通过标准逆动力学方法计算净内联矩和电源。使用平均差异95％Bootstrap置信带方法，在整个曲线上统计分析所有相关变量。 GRF在后部导向，在转动阶段期间旋转，横向转动。逆转方向，在接近阶段期间的大小减少。步骤转动显示踝关节发电减少，而旋转转弯显示大TZ。两种策略在摆动期间都需要大膝部和髋关节冠状和横向平面矩。这些动力学差异突出了在转弯期间保持稳定性和重新定向身体所需的适应性：从临床的角度来看，转向步态可能更好地揭示弱点和电机控制缺陷，而不是直接行走在病理群体中，例如脑瘫的儿童，并且可能在标准步态分析会议中实施。 （c）2014年elestvier有限公司保留所有权利。

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