Keshner E A
Department of Physical Therapy, University of Illinois, Chicago 60612.
Phys Ther. 1990 Dec;70(12):844-54. doi: 10.1093/ptj/70.12.844.
Human movement systems have frequently been treated as one-dimensional, single-axis, rigid bodies in order to simplify the gathering, analysis, and interpretation of data. The problem with this approach is that the results of such assumptions often lead to conclusions about the production and control of movement that do not relate to the control demands placed on the central nervous system. In order to truly understand how the central nervous system plans and produces movements to match environmental demands, we must take into account the many variations available within the body. The purpose of this article is to examine two movement systems that have the potential to act in multiple spatial dimensions with variable muscle action patterns when performing a stabilizing task. Methods of analyzing how the systems operate under differing task constraints and results of the experiments will be presented. Hypothetical models that have been proposed to explain how complex movement systems operate will also be discussed.
为了简化数据的收集、分析和解释，人体运动系统常常被视为一维、单轴的刚体。这种方法的问题在于，此类假设的结果往往会得出与施加于中枢神经系统的控制需求无关的运动产生和控制方面的结论。为了真正理解中枢神经系统如何规划和产生运动以匹配环境需求，我们必须考虑身体内部存在的多种变化。本文的目的是研究两个运动系统，它们在执行稳定任务时有可能在多个空间维度上以可变的肌肉动作模式发挥作用。将介绍分析这些系统在不同任务约束下如何运作的方法以及实验结果。还将讨论为解释复杂运动系统如何运作而提出的假设模型。
