Coordination of eye and leg movements during visually guided stepping
Coordination of eye and leg movements during visually guided stepping
复制标题
DOI：
10.1080/00222890109603151
复制
发表时间：
2001-06-01
影响因子：
1.4
通讯作者：
Marple-Horvat, DE
中科院分区：
文献类型：
--
作者：
Hollands, MA;Marple-Horvat, DE
在本研究中，检验了两个相关的假设：第一，在精确地踏上视觉目标的过程中，视觉以前馈控制模式使用；第二，在该任务中，眼球运动和运动控制中心相互作用，产生协调的眼睛和腿部运动。受试者(N=4)的眼球运动和踏步周期转换事件被监测，同时他们在视觉信息的可获得性受到限制或间歇性地完全移除的条件下，执行一项任务，要求在每一步都准确地将脚放在不规则放置的踏板上。即使在信息长达500毫秒的时间里看不见的情况下，也几乎总是会做出准确的扫视，然后是准确的脚步，到达下一个脚步目标。尽管视觉信息的暂时移除(和随后的恢复)导致了抬脚的延迟，但眼球运动开始和开始向目标摆动之间的平均间隔没有显著差异(p>；0.05)。相反，在不同的实验条件下，从目标开始扫视到脚落在目标上(站立开始)之间的平均间隔确实有显著差异(p<；0.05)。这些结果支持了所陈述的假设。
In the present study, 2 related hypotheses were tested: first, that vision is used in a feedforward control mode during precision stepping onto visual targets and, second, that the oculomotor and locomotor control centers interact to produce coordinated eye and leg movements during that task. Participants' (N = 4) eye movements and step cycle transition events were monitored while they performed a task requiring precise foot placement at every step onto irregularly placed stepping stones under conditions in which the availability of visual information was either restricted or intermittently removed altogether. Accurate saccades, followed by accurate steps, to the next footfall target were almost always made even when the information had been invisible for as long as 500 ms. Despite delays in footlift caused by the temporary removal (and subsequent reinstatement) of visual information, the mean interval between the start of the eye movement and the start of the swing toward a target did not vary significantly (p > .05). In contrast, the mean interval between saccade onset away from a target and a foot landing on that target (stance onset) did vary significantly (p < .05) under the different experimental conditions. Those results support the stated hypotheses.