Visual Regulation of Gait: Zeroing in on a Solution to the Complex Terrain Problem
Visual Regulation of Gait: Zeroing in on a Solution to the Complex Terrain Problem
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DOI：
10.1037/xhp0000435
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发表时间：
2017-10-01
影响因子：
2.1
通讯作者：
Fajen, Brett R.
中科院分区：
文献类型：
--
作者：
Barton, Sean L.;Matthis, Jonathan S.;Fajen, Brett R.
我们研究了视觉步态调节的理论理解，这是自Lee，Lishman和Thompson（1982）对优秀跳远运动员的经典研究发表以来数十年的研究中出现的。第一轮研究确定了特定的信息变量，动作系统的参数，以及在这种情况下捕获感知和动作耦合的控制定律，但没有回答为什么视觉信息以间歇性的方式采样以及行为者采取的策略如何确保稳定性和能量效率等重要问题。最近的发展导致一个细化的视图，根据视觉信息被用于在步态周期的特定阶段修改的参数，管理身体的被动动力学。然后，我们提出了一个新的实验的结果，旨在测试的预测，当地形提供多个立足点的选择，为一个给定的步骤，步行者的选择将受到约束的强烈偏好，不干扰自然，弹道运动的身体在整个单一的支持阶段的步骤。研究结果与这一预测是一致的，并支持视觉步态调节的观点，这与当代演员如何使用主动和被动控制模式的帐户是一致的。
We examine the theoretical understanding of visual gait regulation that has emerged from decades of research since the publication of Lee, Lishman, and Thompson's (1982) classic study of elite long jumpers. The first round of research identified specific informational variables, parameters of the action system, and laws of control that capture the coupling of perception and action in this context, but left unanswered important questions about why visual information is sampled in an intermittent manner and how the strategies that actors adopt ensure stability and energetic efficiency. More recent developments lead to a refined view according to which visual information is used at a specific phase of the gait cycle to modify the parameters that govern the passive dynamics of the body. We then present the results of a new experiment designed to test the prediction that when the terrain offers multiple foothold options for a given step, walkers' choices will be constrained by a strong preference for not interfering with the natural, ballistic movement of the body throughout the single support phase of that step. The findings are consistent with this prediction and support a view of visual gait regulation that is concordant with contemporary accounts of how actors use both active and passive modes of control.