Rosenbaum D A, Loukopoulos L D, Meulenbroek R G, Vaughan J, Engelbrecht S E
University of Massachusetts, Amherst.
Psychol Rev. 1995 Jan;102(1):28-67. doi: 10.1037/0033-295x.102.1.28.
This article describes a theory of the computations underlying the selection of coordinated motion patterns, especially in reaching tasks. The central idea is that when a spatial target is selected as an object to be reached, stored postures are evaluated for the contributions they can make to the task. Weights are assigned to the stored postures, and a single target posture is found by taking a weighted sum of the stored postures. Movement is achieved by reducing the distance between the starting angle and target angle of each joint. The model explains compensation for reduced joint mobility, tool use, practice effects, performance errors, and aspects of movement kinematics. Extensions of the model can account for anticipation and coarticulation effects, movement through via points, and hierarchical control of series of movements.
本文描述了一种关于协调运动模式选择背后计算过程的理论，特别是在伸手够物任务中。核心观点是，当选择一个空间目标作为要够到的物体时，会评估存储的姿势对该任务所能做出的贡献。为存储的姿势分配权重，并通过对存储姿势进行加权求和来找到单个目标姿势。通过减小每个关节的起始角度和目标角度之间的距离来实现运动。该模型解释了对关节活动度降低的补偿、工具使用、练习效果、性能误差以及运动运动学的各个方面。该模型的扩展可以解释预期和协同发音效果、通过中间点的运动以及一系列运动的分层控制。
