Visual reliance for balance control in older adults persists when visual information is disrupted by artificial feedback delays.
Visual reliance for balance control in older adults persists when visual information is disrupted by artificial feedback delays.
复制标题
DOI：
10.1371/journal.pone.0091554
复制
发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Balasubramaniam R
中科院分区：
文献类型：
--
作者：
Yeh TT;Cluff T;Balasubramaniam R
来自眼睛、皮肤和肌肉的感觉信息有助于引导和纠正平衡。然而，很少有人意识到的是，在我们的眼睛、四肢和中枢神经系统之间传递感觉信息的延迟可能超过几十毫秒。研究这些时间延迟的感觉信号如何影响平衡控制是理解体位系统的核心。在这里，我们研究延迟视觉反馈和认知表现如何影响健康年轻人和老年人的姿势控制。这项任务要求参与者尽可能准确地定位他们的压力中心（COP）在一个固定的目标上，而不需要关于他们的压力中心位置的视觉反馈（睁眼平衡），或者在视觉压力中心反馈上施加人为的时间延迟。在选定的试验中，参与者还执行了一个无声的算术任务（认知双重任务）。我们使用低通和高通滤波例程将COP时间序列分离成不同的频率分量。视觉反馈延迟影响年轻人和老年人的低频姿势矫正，老年人的姿势摇摆增加更大。相比之下，认知表现降低了年轻人快速压力中心位移的可变性，但没有改变老年人的姿势摇摆。我们的研究结果表明，老年人优先考虑视力来控制姿势。即使有关任务的反馈延迟了几百毫秒，这种视觉依赖仍然存在。
Sensory information from our eyes, skin and muscles helps guide and correct balance. Less appreciated, however, is that delays in the transmission of sensory information between our eyes, limbs and central nervous system can exceed several 10s of milliseconds. Investigating how these time-delayed sensory signals influence balance control is central to understanding the postural system. Here, we investigate how delayed visual feedback and cognitive performance influence postural control in healthy young and older adults. The task required that participants position their center of pressure (COP) in a fixed target as accurately as possible without visual feedback about their COP location (eyes-open balance), or with artificial time delays imposed on visual COP feedback. On selected trials, the participants also performed a silent arithmetic task (cognitive dual task). We separated COP time series into distinct frequency components using low and high-pass filtering routines. Visual feedback delays affected low frequency postural corrections in young and older adults, with larger increases in postural sway noted for the group of older adults. In comparison, cognitive performance reduced the variability of rapid center of pressure displacements in young adults, but did not alter postural sway in the group of older adults. Our results demonstrate that older adults prioritize vision to control posture. This visual reliance persists even when feedback about the task is delayed by several hundreds of milliseconds.
登录
查看更多内容
影响因子：
2.5
作者：
Kiemel, T;Oie, KS;Jeka, JJ
通讯作者：
Jeka, JJ
影响因子：
6.7
作者：
Horak, Fay B.
通讯作者：
Horak, Fay B.
DOI：
10.1523/jneurosci.3522-09.2011
发表时间：
2011-01-26
期刊：
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子：
--
作者：
Knill DC;Bondada A;Chhabra M
通讯作者：
Chhabra M
影响因子：
2.4
作者：
Brauer, SG;Woollacott, M;Shumway-Cook, A
通讯作者：
Shumway-Cook, A
影响因子：
2.4
作者：
Dault, MC;Frank, JS;Allard, F
通讯作者：
Allard, F