A minimum energy cost hypothesis for human arm trajectories
A minimum energy cost hypothesis for human arm trajectories
复制标题
DOI：
10.1007/s004220050324
复制
发表时间：
1997-02-01
影响因子：
1.9
通讯作者：
Alexander, RM
中科院分区：
文献类型：
--
作者：
Alexander, RM
许多任务需要手臂从初始位置移动到指定的目标位置，但让我们自由选择它们之间的轨迹。本文提出并测试了假设，轨迹的选择，以尽量减少代谢能量成本。成本计算的范围内可能的轨迹，在以前公布的实验中使用的端点之间的运动。计算出的能量最小化的双关节肘肌肉模型的轨迹与观察到的快速运动的轨迹一致。如果假设缓慢的运动是由较慢的肌肉完成的，则也可以获得良好的一致性。所有肌肉都是单关节的模型在预测观察到的轨迹方面不太成功。研究了载荷和反向运动的影响。
Many tasks require the arm to move from its initial position to a specified target position, but leave us free to choose the trajectory between them. This paper presents and tests the hypothesis that trajectories are chosen to minimize metabolic energy costs. Costs are calculated for the range of possible trajectories, for movements between the end points used in previously published experiments. Calculated energy minimizing trajectories for a model with biarticular elbow muscles agree well with observed trajectories for fast movements. Good agreement is also obtained for slow movements if they are assumed to be performed by slower muscles. A model in which all muscles are uniarticular is less successful in predicting observed trajectories. The effects of loads and of reversing the direction of movement are investigated.