Intermittent visual information and the multiple time scales of visual motor control of continuous isometric force production
Intermittent visual information and the multiple time scales of visual motor control of continuous isometric force production
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DOI：
10.3758/bf03206496
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发表时间：
2005-02-01
期刊：
影响因子：
--
通讯作者：
Newell, KM
中科院分区：
文献类型：
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作者：
Sosnoff, JJ;Newell, KM
在一项实验中，我们检查了视觉信息的间歇性（从 25.6 Hz 到 0.2 Hz）对连续等长力产生的影响，作为力量水平（最大自主收缩 [MVC] 的 5%、10%、25% 和 50%）的函数。随着视觉间歇率的增加，力的变化量减少，力输出的不规则性增加。研究发现，视觉对力输出的频率结构有影响，最高可达 12 Hz，25% MVC 力水平具有更多的高频调制，视觉信息率更高。间歇性视觉信息的有效使用是由力水平非线性调节的，并且视觉控制有多个时间尺度（范围，±0-12 Hz），这些时间尺度被假定为反馈和前馈控制过程的函数。
In an experiment, we examined the effect of intermittency (from 25.6 Hz to 0.2 Hz) of visual information on continuous isometric force production as a function of force level (5%, 10%, 25%, and 50% of maximal voluntary contraction [MVC]). The amount of force variability decreased and the irregularity of force output increased as a function of increased visual intermittency rate. Vision was found to have an influence on the frequency structure of force output up to 12 Hz, and the 25% MVC force level had more high-frequency modulations with higher rates of visual information. The effective use of intermittent visual information is mediated nonlinearly by force level, and there are multiple time scales of visual control (range, ∼ 0-12 Hz) that are postulated to be a function of both feedback and feedforward control processes.