Limits of recovery against slip-induced falls while walking.
Limits of recovery against slip-induced falls while walking.
复制标题
行走时滑倒导致的恢复限制。
DOI：
10.1016/j.jbiomech.2011.08.018
复制
发表时间：
2011
影响因子：
2.4
通讯作者：
Pai,Yi-Chung
中科院分区：
文献类型：
--
作者：
Yang,Feng;Bhatt,Tanvi;Pai,Yi-Chung
滑倒引起的步态福尔斯跌倒往往会造成毁灭性的后果。本研究的目的是：1）选择能够最好地区分步态中引起的突然滑倒的结果（恢复或福尔斯）的决定因素（并找到它们相应的阈值，即，恢复的极限，它可以清楚地区分这两种结果），和2）在重复滑动试验的子集中验证这些结果。基于收集的数据从69个年轻的受试者在一个滑移诱导步态，9种不同的方式相结合的质量中心（COM）的稳定性，髋高，其垂直速度进行了调查与援助的逻辑回归。结果表明，在恢复步骤触地之前的瞬间记录的COM稳定性和肢体支撑（由髋关节垂直速度与髋关节高度的商表示，Ship）足够灵敏，可以解释福尔斯的所有（100%）变化，并且足够特异，可以解释恢复中的几乎所有（98.3%）变化。该边界（Ship=− 0.22 s −0.25）量化了稳定性-肢体支撑商数（s-Ship）域中的福尔斯风险，使用第二次滑动和第三次滑动试验（n=76）进行了充分验证，福尔斯分类为100%，恢复率为98.6%。实际跌倒的严重程度可能在边界以下更大，而在边界以上跌倒的可能性减小。最后，边界的斜率还表明稳定性和肢体支撑之间的权衡，由此高稳定性可以补偿肢体支撑的不足，反之亦然。
Slip-induced falls in gait often have devastating consequences. The purposes of this study were 1) to select the determinants that can best discriminate the outcomes (recoveries or falls) of an unannounced slip induced in gait (and to find their corresponding threshold, i.e., the limits of recovery, which can clearly separate these two outcomes), and 2) to verify these results in a subset of repeated-slip trials. Based on the data collected from 69 young subjects during a slip induced in gait, nine different ways of combining the center of mass (COM) stability, the hip height, and its vertical velocity were investigated with the aid of logistic regression. The results revealed that the COM stability (s) and limb support (represented by the quotient of hip vertical velocity to hip height, Ship) recorded at the instant immediately prior to the recovery step touchdown were sufficiently sensitive to account for all (100%) variance in falls, and specific enough to account for nearly all (98.3%) variability in recoveries. This boundary (Ship=−0.22s−0.25), which quantifies the risk of falls in the stability–limb support quotient (s–Ship) domain, was fully verified using second-slip and third-slip trials (n=76) with classification of falls at 100% and recoveries at 98.6%. The severity of an actual fall is likely to be greater further below the boundary, while the likelihood of a fall diminishes above it. Finally, the slope of the boundary also indicates the tradeoff between the stability and limb support, whereby high stability can compensate for the insufficiency in limb support, or vice versa.
影响因子：
2.5
作者：
Bhatt, T.;Pai, Y. C.
通讯作者：
Pai, Y. C.
影响因子：
2.4
作者：
Pai, YC;Rogers, MW;Hanke, TA
通讯作者：
Hanke, TA
修正板在低摩擦条件下移动时产生的惯性效应。
影响因子：
2.4
作者：
Yang,Feng;Pai,Yi-Chung
通讯作者：
Pai,Yi-Chung