Aging, Time Scales, and Sensorimotor Variability
Aging, Time Scales, and Sensorimotor Variability
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DOI：
10.1037/a0017911
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发表时间：
2009-12-01
影响因子：
3.7
通讯作者：
Liu, Yeou-Teh
中科院分区：
文献类型：
--
作者：
Newell, Karl M.;Mayer-Kress, Gottfried;Liu, Yeou-Teh
它是公认的，有一个增加量的个体内变异与老化的各种行为环境。在这里，我们阐述了从自组织和动态系统的框架，调查相关的时间尺度的变化作为一个功能的老化和它们的关系的数量和结构（频率和时间域）的变化的运动和姿势的变化。特别是，我们检查了一般假设的证据，即（a）随着年龄的增长，运动控制的时间尺度减少甚至丧失，（B）运动输出变异的时间尺度越短，作为揭示衰老和疾病的发病和早期影响的生物标志物的测量就越敏感。动态分析的时间尺度的变异性区分的独特作用的稳定性和噪音的增加量的个体内的变异与老化。
It is well established that there is an increased amount of intraindividual variability with aging in a variety of behavioral contexts. Here, we elaborate from a self-organization and dynamic systems framework to investigate the relevant time scales of variability as a function of aging and their relation to the changes in the amount and structure (frequency and time domains) of movement and postural variability. In particular, we examine evidence for the general hypotheses that (a) there is a reduction or even loss of shorter time scales in the control of movement with aging and (b) the shorter the time scale in motor output variability, the more sensitive the measure is as a biomarker to revealing the onset and early influence of aging and disease. The dynamic analysis of the time scales of variability distinguishes the distinctive roles of stability and noise in the increased amount of intraindividual variability with aging.