Absolute Coordination

在走路和跑步时，胳膊和腿像钟摆一样运动，并像时钟一样产生有规律的、可重复的间隔。它们也以相同的频率运动。本研究旨在进一步了解钟摆、时钟运动绝对协调背后的一般原理。实验中，人们在手腕上摆动不同质量和长度的手持钟摆，研究以下问题：能量是如何在一个运动周期中获得和失去的？这些得失如何与四肢相关？运动周期的振幅与持续时间有什么关系？首选振幅如何随质量和长度的变化而变化？肢体间相关系可能有多少种，它们有多稳定？绝对协调如何用物理术语来定义？这些数据将通过各种非线性动力学的形式化方法进行分析。这些结果应该有助于韵律活动的形式化建模。它们最终应该有助于教授各种类型的韵律性身体活动，并扩展理解韵律性运动障碍原因的基础。

In walking and running, the arms and legs move like pendulums and produce regular, repeatable intervals, like clocks do. They also move at the same frequency. This research aims to further the understanding of the general principles behind this absolute coordination of pendular, clocking movements. Experiments in which people will swing hand-held pendulums of variable mass and length at their wrists will be concerned with the following kinds of issues: How is energy gained and lost by a movement cycle? How do these gains and losses relate across limbs? How does the amplitude of a movement cycle relate to its duration? How does preferred amplitude change with changes in mass and length? How many between-limb phase relations are possible, and how stable are they? How is absolute coordination to be defined in physical terms? The data will be analyzed through various formal methods of nonlinear dynamics. These results should facilitate the formal modeling of rhythmic activity. They should ultimately be useful in teaching various types of rhythmic physical activity and also in extending the basis for understanding the causes of rhythmic movement disorders.