ELECTROMECHANICAL DELAY - AN EXPERIMENTAL ARTIFACT
ELECTROMECHANICAL DELAY - AN EXPERIMENTAL ARTIFACT
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DOI：
10.1016/1050-6411(92)90017-d
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发表时间：
1992-01-01
影响因子：
2.5
通讯作者：
AGARWAL, GC
中科院分区：
文献类型：
--
作者：
CORCOS, DM;GOTTLIEB, GL;AGARWAL, GC
肌肉激活开始和力或运动开始之间的时间延迟通常被称为机电延迟、运动时间或运动执行时间。这种时间已被用于研究反应时间、肌肉的生理特性和种群差异。在本研究中，我们发现机电延迟由两个部分组成。第一个是传输时间（t(t)），它很短（可能是10毫秒）。第二个是产生可检测的力变化（t(f)）的时间。机电延迟的绝对持续时间通常由第二个分量决定，第二个分量受以下四个独立因素的影响：t(f) = g (t /R Z(d)/Z(m))，即t(f)是两个比值乘积的函数(g)。一个是在测量装置的阈值T和肌肉力上升的速率R之间。另一个是测量装置的机械阻抗（Z(d)）与肌肉的机械阻抗（Z(m)）之比。我们的结论是，测量的机电延迟绝对值没有生理或心理意义，任务和绩效引起的变化在解释时需要非常小心。
The time delay between the onset of muscle activation and the onset of force or motion is commonly referred to as electromechanical delay, motor time, or motor execution time. This time has been used in the study of reaction time, of physiological properties of muscle, and of population differences. In this study, we show that electromechanical delay is comprised of two components. The first is transport time (t(t)) which is very brief (perhaps 10 ms). The second is the time to generate detectable changes in force (t(f)). The absolute duration of electromechanical delay is usually dominated by the second component which is influenced by four separate factors that are related in the following way: t(f) = g (T/R Z(d)/Z(m))That is, t(f) is a function (g) of the product of two ratios. One is between the threshold T of the measuring device and the rate R at which muscle force rises. The other is the ratio of the mechanical impedances of the measuring device (Z(d)) and the muscle (Z(m)). We conclude that the measured absolute value of electromechanical delay has no physiological or psychological meaning and that task and performance induced changes need great care in their interpretation.