Terminal accuracy of unexpectedly loaded rapid movements: evidence for a mass-spring mechanism in programming.
Terminal accuracy of unexpectedly loaded rapid movements: evidence for a mass-spring mechanism in programming.
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意外加载的快速运动的终端精度：编程中质量弹簧机制的证据。
作者：
R. Schmidt;C. McGown
描述了在人体中使用快速定位运动的实验，其中受试者突然和意外地获得了肢体负荷特性的变化。总而言之，结果模式支持单向肢体作用的质量弹簧模型，在该模型中，肢体移动到由激动剂和拮抗剂中的相对张力定义的位置。此外，各种结果也提供了与脉冲计时观点和反馈处理观点相反的证据，在脉冲计时观点中，运动程序对肌肉系统的脉冲开始计时，在反馈处理观点中，肢体位置通过最小化反馈指示的定位误差来定义。证据表明，阶段化在运动程序中的作用可能不同于一个频段上的单向动作和另一个频段上的多方向和/或多分量动作。
Experiments using rapid-positioning movements in humans, where the subject is suddenly and unexpectedly provided with a change in the load characteristics of the limb, are described. Taken together, the pattern of results supports a mass-spring model of unidirectional limb action, where the limb moves to a position defined by the relative tensions in the agonist and antagonist. As well, various results provide evidence contrary to predictions from an impulse-timing viewpoint, where the motor program times the onset of impulses to the musculature, and against a feedback-processing viewpoint, where limb position is defined by minimizing positioning error indicated by feedback. The evidence suggests that the role of phasing in motor programs may be different for unidirectional actions on the one band and multi-directional and/or multi-component actions on the other.