Rosenbaum D, Meulenbroek R J, Vaughan J, Elsinger C
Dept. of Psychology, Pennsylvania State University, University Park, PA 16802, USA.
Motor Control. 1999 Jul;3(3):289-97; discussion 316-25. doi: 10.1123/mcj.3.3.289.
The hypothesis introduced by Smeets and Brenner concerning the perpendicular approach of the thumb and index finger during grasping has heuristic value, but it also has limitations. Among the limitations are the following: (a) the approach parameter is not directly testable and it is unclear how the values of deceleration at contact and movement time are set theoretically; (b) it is questionable that motion of the thumb and index finger are independent; (c) reliance on the minimum-jerk account ignores critiques of that account; and (d) the model begs the question of how the effectors proximal to the index finger and thumb are controlled. We briefly review an alternative model that can handle these challenges.
斯米茨和布伦纳提出的关于抓握时拇指和食指垂直接近的假说具有启发价值，但也存在局限性。这些局限性包括：(a)接近参数无法直接测试，并且理论上不清楚接触时的减速值和运动时间是如何设定的；(b)拇指和食指的运动是否独立存在疑问；(c)依赖最小急动账户忽略了对该账户的批评；(d)该模型回避了食指和拇指近端效应器如何控制的问题。我们简要回顾一个能够应对这些挑战的替代模型。
