Whole-body angular momentum in incline and decline walking
Whole-body angular momentum in incline and decline walking
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DOI：
10.1016/j.jbiomech.2012.01.012
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发表时间：
2012-04-05
影响因子：
2.4
通讯作者：
Neptune, Richard R.
中科院分区：
文献类型：
--
作者：
Silverman, Anne K.;Wilken, Jason M.;Neptune, Richard R.
角动量在步态周期中受到高度调节，对于保持动态稳定性和运动控制非常重要。然而，当坠落的风险较高时，关于角动量在不规则表面（例如斜坡）上如何调节的知之甚少。本研究探讨了30名健康受试者的三维全身角动量模式的倾斜和下降的角度范围内行走。角动量的范围是相似的或减少下降表面和增加倾斜表面相对于水平地面，与最大的差异发生在正面和矢状面。这些结果表明，当跌倒的风险更大时，在下坡行走过程中，角动量受到更严格的控制。在额面，角动量的范围与早期站立时髋关节和膝关节外展力矩的峰值密切相关。在横向平面上，最强的相关性发生在站立后期的膝关节外旋峰。在矢状面，所有的外部力矩峰值与角动量的范围相关。峰值踝跖屈，膝关节屈曲和髋关节伸展力矩也与矢状面角动量密切相关。这些结果突出了健全的受试者如何在倾斜表面上相对于水平行走不同地控制角动量，并提供了与更容易跌倒的病理人群进行比较的基线。(c)2012爱思唯尔有限公司保留所有权利。
Angular momentum is highly regulated over the gait cycle and is important for maintaining dynamic stability and control of movement. However, little is known regarding how angular momentum is regulated on irregular surfaces, such as slopes, when the risk of falling is higher. This study examined the three-dimensional whole-body angular momentum patterns of 30 healthy subjects walking over a range of incline and decline angles. The range of angular momentum was either similar or reduced on decline surfaces and increased on incline surfaces relative to level ground, with the greatest differences occurring in the frontal and sagittal planes. These results suggest that angular momentum is more tightly controlled during decline walking when the risk of falling is greater. In the frontal plane, the range of angular momentum was strongly correlated with the peak hip and knee abduction moments in early stance. In the transverse plane, the strongest correlation occurred with the knee external rotation peak in late stance. In the sagittal plane, all external moment peaks were correlated with the range of angular momentum. The peak ankle plantarflexion, knee flexion and hip extension moments were also strongly correlated with the sagittal-plane angular momentum. These results highlight how able-bodied subjects control angular momentum differently on sloped surfaces relative to level walking and provide a baseline for comparison with pathological populations that are more susceptible to falling. (c) 2012 Elsevier Ltd. All rights reserved.