Coordination Dynamics

该提案针对的是人类同步有节奏的肢体运动的基本能力，例如，双手协调，其中两只手一起周期性地同相或异相移动。特别地，该提议针对这种基本节奏协同的稳定性和可变性如何受到无关的认知活动（例如，对话、解决问题和心算）。计划进行几种类型的实验，涉及双手类振荡。在双手任务中，将操纵组件的相位、它们一起振荡的频率以及它们单独振荡的频率。正在进行的认知活动的难度、多样性和随机性也将被操纵。三空间运动分析仪将用于收集运动数据，非线性动力学方法将用于解决这些问题。 拟议中的实验应该会促进对行为如何适应共同注意条件的理解。特别是，他们将有助于行为重组的理论，将在自组织系统的数学和物理框架内发展。 预期结果的具体应用包括运动和意志行为障碍。了解认知活动如何影响运动稳定性与运动康复方案的发展有关。对节奏变化认知来源的进一步理解与帕金森氏症、亨廷顿氏症以及涉及序列和时间的相关疾病的研究有关。非线性分析技术的建议（产生诊断定量和图形的措施）将获得临床医生的重要性，分析复杂的运动模式的技术变得越来越普遍。

The proposal is directed at the fundamental human ability to synchronize rhythmic limb movements, for example, a bimanual coordination in which the two hands move together cyclically in phase or out of phase. In particular, the proposal is directed at how the stability and variability of this basic rhythmic synergy is affected by unrelated cognitive activity (e.g., conversing, problem solving, and mental arithmetic) that occurs in parallel with the synergy. Experiments of several types are planned involving bimanual pendulum-like oscillations. In the bimanual tasks the phasing of components, the frequency at which they oscillate together, and the frequency at which they oscillate alone will be manipulated. The difficulty, variety, and randomness of ongoing cognitive activity will also be manipulated. Three-space motion analyzers will be used to collect the movement data and methods of nonlinear dynamics will be used to address them. The proposed experiments should advance understanding of how behavior adapts to conditions of shared attention. In particular they will contribute to a theory of behavioral re-organization to be developed within the framework of the mathematics and physics of self-organizing systems. Specific applications of the expected results include disorders of movement and volitional action. Comprehending how cognitive activity affects movement stability is relevant to the development of movement rehabilitation regimens. Enhanced understanding of cognitive sources of rhythmic variance is relevant to the study of Parkinson's, Huntington's, and related disorders involving sequencing and timing. The nonlinear analysis techniques to be developed in the proposal (yielding diagnostic quantitative and graphical measures) will gain in importance to clinicians as the technology for analyzing complicated movement patterns becomes more commonplace.