Haworth Joshua, Stergiou Nicholas
Department of Kinesiology, Science and Learning Center, Whittier College, Whittier, CA, United States.
Department of Biomechanics, University of Nebraska Omaha, Omaha, NE, United States.
Front Physiol. 2018 Oct 11;9:1441. doi: 10.3389/fphys.2018.01441. eCollection 2018.
We explored the coupling of gaze and postural sway to the motion of a visual stimulus, to further understand sensorimotor coordination. Visual stimuli consisted of a horizontally oscillating red dot, moving with periodic (sine), chaotic, or aperiodic (brown noise) temporal structure. Cross Recurrence Quantification Analysis (cRQA) was used to investigate the coupling between each measured signal with the time series of the visual stimulus position. The cRQA parameter of percent determinism indicated similar strength of coupling of gaze with either periodic or chaotic motion structures, yet weaker coupling to aperiodic stimulus motion. The cRQA parameter of Maxline indicated a particular affinity toward chaotic motion. Analysis of postural coupling supports the idea that the complex periodicity of body sway affords interactivity with non-simple environmental dynamics. These results collectively strengthen the argument that chaos is an invariant and beneficial feature of biological motion, a feature which may be critical for immediate and robust coordination of the self with the environment and other environmental agents.
我们探究了注视与姿势摆动对视觉刺激运动的耦合作用，以进一步理解感觉运动协调。视觉刺激由一个水平振荡的红点组成，其运动具有周期性（正弦）、混沌或非周期性（布朗噪声）的时间结构。交叉递归量化分析（cRQA）用于研究每个测量信号与视觉刺激位置时间序列之间的耦合。确定性百分比的cRQA参数表明，注视与周期性或混沌运动结构的耦合强度相似，但与非周期性刺激运动的耦合较弱。最大线的cRQA参数表明对混沌运动有特殊的亲和力。姿势耦合分析支持这样一种观点，即身体摆动的复杂周期性提供了与非简单环境动力学的交互作用。这些结果共同强化了这样一个观点，即混沌是生物运动的一个不变且有益的特征，这一特征对于自我与环境及其他环境因素的即时和稳健协调可能至关重要。
