Park H, Collins D R, Turvey M T
Center for the Ecological Study of Perception and Action, University of Conneticut, Storrs 06269-1020, USA.
J Exp Psychol Hum Percept Perform. 2001 Feb;27(1):32-47.
Interlimb coordination is subject to constraints. One major constraint has been described as a tendency for homologous muscle groups to be activated simultaneously. Another has been described as a biasing of limb segments to movement in the same direction. In 2 experiments, the 2 constraints were placed in opposition: In-phase or antiphase contraction of homologous muscles of contralateral limbs produced movement that was spatially antiphase or in-phase, respectively. Probability distributions of relative phase were obtained under manipulations of phase detuning and movement speed. They revealed that the equilibrium and stability of coordination were related, respectively, to spatial relative phase and muscular relative phase. Previously observed spatial and muscular constraints reflect a (possibly very general) factorization of attractor location and attractor strength in the dynamics of interlimb coordination.
肢体间协调受到多种限制。一种主要限制被描述为同源肌肉群倾向于同时激活。另一种限制则被描述为肢体节段偏向于朝同一方向运动。在两项实验中，这两种限制相互对立：对侧肢体同源肌肉的同相或反相收缩分别产生了空间上的反相或同相运动。在相位失谐和运动速度的操控下获得了相对相位的概率分布。结果表明，协调的平衡和稳定性分别与空间相对相位和肌肉相对相位有关。先前观察到的空间和肌肉限制反映了肢体间协调动力学中吸引子位置和吸引子强度的一种（可能非常普遍的）因式分解。
