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首页> 外文期刊>Journal of Neurophysiology >Balance-corrective responses to unexpected perturbations at the arms during treadmill walking
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Balance-corrective responses to unexpected perturbations at the arms during treadmill walking

机译：跑步机行走过程中对手臂意外振动的平衡校正反应

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摘要

The arms have been shown to be involved in the regulation of balance during walking. The use of a walking aid enhances balance by increasing the base of support and reducing the load on the legs by partly transferring it to the arms. However, when actively engaged during a balance task, perturbations to the arms can destabilize balance. Previous studies have investigated postural adjustments associated with focal arm movements during standing and walking. However, balance-corrective reactions to unexpected perturbations to the arms during walking have not been well studied. In the present study, subjects walked on a treadmill while grasping a pair of handles when sudden perturbations were delivered by displacing the handles in the forward or backward direction. Instructing subjects to oppose the displacement of the handles resulted in strong responses in the arms that were accompanied by activation of muscles in the legs, comparable to those observed in other balance disturbance studies. Conversely, when subjects were instructed to allow the handles to move when displaced, no responses were observed in the arms. However, similar responses were observed in the legs whether subjects opposed the displacement of the handles or not when perturbations were applied at heel strike. The results from this study show that balance reactions can be elicited in the legs in response to perturbations applied at the arms, and that the expression of these responses is affected by the task engaged in by the arms.
机译：手臂在行走过程中被证明参与平衡调节。使用助行器可以增加支撑基础，并通过将其部分转移到手臂上来减轻腿部负担，从而增强平衡感。但是，当您在平衡任务中积极参与时，对手臂的干扰会破坏平衡。先前的研究已经调查了站立和行走过程中与手臂的运动有关的姿势调整。然而，对步行过程中对手臂的意外干扰进行的平衡校正反应尚未得到很好的研究。在本研究中，当通过向前或向后移动手柄而产生突然的扰动时，受试者会抓住一对手柄在跑步机上行走。指示受试者反对手柄的移动会导致手臂强烈反应，并伴随腿部肌肉的激活，这与其他平衡干扰研究中观察到的结果相当。相反，当指示受试者在移位时允许手柄移动时，手臂中未观察到任何反应。但是，在脚后跟冲击时，无论受试者是否反对手柄的移动，腿部都观察到了类似的反应。这项研究的结果表明，对手臂施加的扰动可以在腿部引起平衡反应，并且这些反应的表达受手臂从事的任务影响。

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