Kinematic synergies in over-ground slip recovery outcomes: Distinct strategies or a single strategy?
Kinematic synergies in over-ground slip recovery outcomes: Distinct strategies or a single strategy?
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DOI：
10.1016/j.gaitpost.2021.01.025
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发表时间：
2022-06
期刊：
影响因子：
2.4
通讯作者：
Bhatt T
中科院分区：
文献类型：
--
作者：
Wang S;Pai YC;Bhatt T
在经历了意外的滑落扰动后，个体的行为表现可以分为三类：恢复、前脚跌倒和劈裂跌倒。研究人员不确定这些滑落结果的差异是由于不同的策略还是单一策略的一部分。老年人在新滑倒过程中的不同行为结果是否具有不同的运动学协同效应？使用主成分分析(PCA)从87名参与者的节段角度提取运动学协同效应。前两个主成分(PC1和PC2)在滑动前、早期反应和晚期反应阶段在不同的滑动结果中进行了比较。结果表明，滑行前阶段和早期反应阶段的运动学协同效应在三种结果(恢复、劈裂下落和前脚下落)中具有高度的一致性。在反应后期，劈裂下落和前脚下落在恢复阶段表现出不同的运动学协同效应。我们的发现表明，在滑倒前和早期反应阶段，单一的策略可能适用于不同的滑倒结果，而与恢复的个体相比，跌倒者使用的是不同的策略。在滑行前阶段躯干屈曲较大，在反应早期和反应后期滑脱肢体的膝关节屈曲和足底屈曲较大，在反应后期恢复肢体的伸膝较大会降低跌倒风险。这项研究将有助于评估控制策略的脆弱性，根据这些脆弱性，可以提供个性化的治疗，以降低对特定类型跌倒的易感性。
After experiencing an unexpected slip perturbation, individuals’ behavioral performance can be classified into three categories: recovery, feet-forward fall, and split fall. Researchers are uncertain whether these differences in slip outcomes are due to distinct strategies or part of a single strategy. Whether older adults with different behavioral outcomes during their novel slip have different kinematic synergies? The kinematic synergies were extracted from segment angles in 87 participants using principal component analysis (PCA). The first two principal components (PC1 and PC2) in pre-slip, early-reactive, and late-reactive phases were compared across different slip outcomes. Results showed that the kinematic synergies in pre-slip and early-reactive phases are highly consistent among the three outcomes (recovery, split fall, and feet-forward fall). For the late-reactive phase, both split falls and feet-forward falls showed different kinematics synergies from recoveries. Our findings indicated that a single strategy might be used for different slip outcomes in the pre-slip and early-reactive phases, while distinct strategies were used by fallers compared to recovered individuals. Specifically, larger trunk flexion in pre-slip phase, larger knee flexion and plantar flexion of the slipping limb in both early-reactive and late-reactive phase, and larger knee extension of the recovery limb in late-reactive phase would lower the fall risk. This study would help to assess the vulnerabilities in control strategy, according to which individualized treatment could be provided to reduce predisposition to specific types of falls.
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DOI：
10.1523/jneurosci.6344-11.2012
发表时间：
2012-08-29
期刊：
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子：
--
作者：
Chvatal SA;Ting LH
通讯作者：
Ting LH
影响因子：
2.9
作者：
Tagliabue, Michele;Ciancio, Anna Lisa;Maier, Marc A.
通讯作者：
Maier, Marc A.
影响因子：
--
作者：
Bizzi, E.;Cheung, V. C. K.;Tresch, M.
通讯作者：
Tresch, M.
影响因子：
2.5
作者：
Freitas, SMSF;Duarte, M;Latash, ML
通讯作者：
Latash, ML
影响因子：
2
作者：
Bhatt, T;Wening, JD;Pai, YC
通讯作者：
Pai, YC