Distinct motor strategies underlying split-belt adaptation in human walking and running.
Distinct motor strategies underlying split-belt adaptation in human walking and running.
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DOI：
10.1371/journal.pone.0121951
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发表时间：
2015
期刊：
影响因子：
3.7
通讯作者：
Nakazawa K
中科院分区：
文献类型：
--
作者：
Ogawa T;Kawashima N;Obata H;Kanosue K;Nakazawa K
本研究的目的是阐明人类在分裂带跑步机上跑步的适应性和去适应性。通过计算地面反力（GRF）的前后分量，比较了适应和去适应的程度与步行的程度。适应步行和跑步的分裂带导致在一个突出的不对称的运动模式后，返回到正常的带条件，而两个组成部分的GRF表现出不同的行为取决于步态。前制动成分在两种步态中都表现出明显的适应和去适应行为。另一方面，后推进成分只在跑步时表现出这种行为，而在步行时只表现出短期的后效（持续不到10秒），伴随着大量的反应性反应。这些结果表明，运动策略（即，使用反应性反馈和自适应前馈控制）的中枢神经系统（CNS）之间的步行和跑步的分裂带运动适应可能存在差异。目前的研究结果提供了人类行走和跑步的神经控制的基础知识，以及运动和康复场景中步态训练的可能策略。
The aim of the present study was to elucidate the adaptive and de-adaptive nature of human running on a split-belt treadmill. The degree of adaptation and de-adaptation was compared with those in walking by calculating the antero-posterior component of the ground reaction force (GRF). Adaptation to walking and running on a split-belt resulted in a prominent asymmetry in the movement pattern upon return to the normal belt condition, while the two components of the GRF showed different behaviors depending on the gaits. The anterior braking component showed prominent adaptive and de-adaptive behaviors in both gaits. The posterior propulsive component, on the other hand, exhibited such behavior only in running, while that in walking showed only short-term aftereffect (lasting less than 10 seconds) accompanied by largely reactive responses. These results demonstrate a possible difference in motor strategies (that is, the use of reactive feedback and adaptive feedforward control) by the central nervous system (CNS) for split-belt locomotor adaptation between walking and running. The present results provide basic knowledge on neural control of human walking and running as well as possible strategies for gait training in athletic and rehabilitation scenes.
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