Schmidt R C, Shaw B K, Turvey M T
Department of Psychology, Tulane University, New Orleans, Louisiana 70118.
J Exp Psychol Hum Percept Perform. 1993 Apr;19(2):397-415. doi: 10.1037//0096-1523.19.2.397.
In 1:1 frequency locking, the interlimb phase difference phi is an order parameter quantifying the spatial-temporal organization of 2 rhythmic subsystems. Dynamical modeling and experimental analyses indicate that an intentional parameter phi psi (intended coordination mode, phi = 0 degrees or phi = 180 degrees) and 2 control parameters omega c (coupled frequency) and delta omega (difference between uncoupled eigen-frequencies) affect phi. An experiment was conducted on 1:1 frequency locking in which phi psi, omega c, and delta omega were manipulated using a paradigm in which a person swings hand-held pendulums. As delta omega deviated from 0, the observed phi deviated from the phi psi, indicating a displacement in the phi attractor point. The displacements were exaggerated by increasing omega c. The displacements were coordinated with a decrease in the stability of phi and with higher harmonics in power spectrum of phi. Implications of the results for modeling interlimb coordination are discussed.
在1:1频率锁定中，肢体间相位差φ是一个序参量，用于量化两个节律子系统的时空组织。动力学建模和实验分析表明，一个意向参数φψ（意向协调模式，φ = 0°或φ = 180°）以及两个控制参数ωc（耦合频率）和Δω（非耦合本征频率之间的差值）会影响φ。进行了一项关于1:1频率锁定的实验，其中通过让人摆动手持摆锤的范式来操纵φψ、ωc和Δω。当Δω偏离0时，观察到的φ偏离了φψ，这表明φ吸引子点发生了位移。通过增加ωc，这些位移被放大。这些位移与φ稳定性的降低以及φ功率谱中的高次谐波相协调。讨论了这些结果对肢体间协调建模的意义。
