Steenbergen B
Innovation Centre, Werkenrode, PO Box 9002, 6560 GC Groesbeek, The Netherlands.
Motor Control. 1999 Jul;3(3):302-6; discussion 316-25. doi: 10.1123/mcj.3.3.302.
The present reaction on the paper of Smeets and Brenner focuses on two premises of their proposed model. The first is that grasping is nothing more than pointing with two fingers. It is argued that this assumption cannot be upheld in light of the differences between both actions with respect to neuromuscular structures, muscular innervation, use of visual feedback, and basic function. The second premise of the model is that the velocity profile of the transport component is symmetrical and independent of intrinsic object properties. It is shown that the symmetrical velocity profile represents a boundary condition and is influenced by intrinsic object properties. Given these concerns, it is doubtful that the model in its present form will add much to our understanding of the control of grasping.
斯米茨和布伦纳论文中的当前反应聚焦于他们所提出模型的两个前提。第一个前提是抓握只不过是用两根手指指物。有人认为，鉴于这两种动作在神经肌肉结构、肌肉神经支配、视觉反馈的使用以及基本功能方面存在差异，这一假设无法成立。该模型的第二个前提是运输部分的速度分布是对称的，且与物体的固有属性无关。研究表明，对称的速度分布代表一种边界条件，并且会受到物体固有属性的影响。鉴于这些问题，目前形式的该模型能否增进我们对抓握控制的理解值得怀疑。
