Coordination in prehension Information-based coupling of reaching and graspingInformation-based coupling of reaching and grasping

被引：0

作者：

Frank T. J. M. Zaal

R. J. Bootsma

Piet C. W. van Wieringen

机构：

[1] Faculty of Human Movement Sciences,

[2] Vrije Universiteit,undefined

[3] Amsterdam,undefined

[4] The Netherlands,undefined

[5] UMR Movement et Perception,undefined

[6] Université de la Méditerranée et CNRS,undefined

[7] Faculté des Sciences du Sport,undefined

[8] 163 Avenue de Luminy,undefined

[9] CP 910,undefined

[10] F-13288 Marseille Cedex 9,undefined

[11] France Fax: +33-91-17-22 56,undefined

来源：

Experimental Brain Research | 1998年 / 119卷

关键词：

Key words Human; Movement; Prehension;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Prehension involves the coordination of a reaching and a grasping movement, such that the hand opens and closes in tune with the transport of the hand to the object to be grasped. To investigate this coordination, we focused on the transition from hand opening to hand closing in the grasping component of prehension. Earlier research has suggested that the time taken to close the hand remains constant over varying reaching amplitudes. In the present experiment, in which subjects reached for objects at six different distances and for objects that moved away from them at three different, constant speeds, hand-closure time was found to vary as a function of experimental conditions. Moreover, initiation of hand closure did not occur at a constant value of the (perceptually available) first-order time remaining until contact with the object. However, the variations observed, occurring as a function of initial hand-object distance and object speed, could be accounted for by an abstract dynamical model of perceptually driven postural changes.

引用

页码：427 / 435

页数：8