Age-related loss of adaptability to fast time scales in motor variability.
Age-related loss of adaptability to fast time scales in motor variability.
复制标题
与年龄相关的运动变异性对快速时间尺度的适应性丧失。
DOI：
10.1093/geronb/63.6.p344
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Newell,KarlM
中科院分区：
文献类型：
--
作者：
Sosnoff,JacobJ;Newell,KarlM
我们研究了老年人有意识地调整他们的感觉运动输出以适应不同时间和频率特性(1/f噪声结构)的靶力目标波形的能力。我们检验了一种假设，即老年人比年轻人对持续感觉运动输出的时间和频率依赖的需求的适应性较差，并且这种影响是由任务需求的频率内容中介的。结果表明，老年人对浅色噪声作用力目标的逼近能力逐渐低于年轻人，并在目标信号的较高频率中利用信息。随着年龄的增长，使用感觉-运动控制的快速时间尺度的能力逐渐下降，但力输出复杂性的损失或增加的特定定向效应被任务要求的不同影响所缓和。
We investigated the ability of older adults to intentionally adapt their sensorimotor output to differing time and frequency properties (1/fnoise structure) of a target-force target waveform. We tested the hypothesis that elderly adults are less adaptable than their younger counterparts to the time- and frequency-dependent demands of continuous sensorimotor output and that this effect is mediated by the frequency content of the task demand. The results showed that older adults were progressively less able than young adults to approximate the lighter-color-noise force targets and utilize the information in the higher frequencies of the target signal. There is a declining ability with aging to use the faster time scales of sensorimotor control, but the particular directional effect of the loss or gain of complexity of force output is moderated by the differential impact of task demands.