Absolute and Relative Coordination

这项研究将检查人们在进行简单（例如，两只手臂以同一节奏移动）和复杂（例如，杂耍）节奏活动时手臂之间的协调模式。它的目标是双重的，(1)确定四肢之间的节奏协调可以稳定和适应性的动力学原理，(2)了解这些原理如何影响人如何控制，感知这些协调的新方面，并学习这些协调。一些实验将操纵肢体之间的相位关系，它们一起运动的频率，以及它们单独运动的频率。其他的将涉及技巧杂耍的条件下，操纵变量的杂耍对象和杂耍模式。数据将使用三维运动分析仪收集，并使用非线性动力学的理论和方法进行处理。这些结果将为协调建模提供有用的约束，并有助于理解节奏性运动障碍。

This research will examine patterns of coordinations between the arms as people engage in simple (e.g., two arms moving at one tempo) and complex (e.g., juggling) rhythmic activities. Its objective is twofold, (1) to identify the dynamical principles by which rhythmic coordinations between the limbs can be both stable and adaptive and (2) to understand how these principles affect how the person controls, perceives new aspects of, and learns these coordinations. Some experiments will manipulate the phase relation between limbs, the frequencies at which they move together, and the frequencies at which they move alone. Others will involve skilled juggling under conditions which manipulate variables of the juggled objects and the juggling pattern. The data will be collected using three-dimensional motion analyzers and addressed using the theory and methods of nonlinear dynamics. The results should provide useful constraints on modeling coordination and contribute to the understanding of rhythmic movement disorders.