Gentilucci M, Daprati E, Gangitano M, Saetti M C, Toni I
Institute of Human Physiology, University of Parma, Italy.
Neuroreport. 1996 Jan 31;7(2):589-92. doi: 10.1097/00001756-199601310-00051.
Subjects were required to reach and grasp a parallelepiped, the position, orientation and size of which were varied. The kinematics of reaching and grasping movements was studied in full vision and in no vision conditions. Both direction and movement amplitude of reaching were affected by object orientation. Conversely, both the time course of finger axis orientation and the angular displacement of the hand at wrist were influenced by object position. These results were not modified by the absence of visual control. Finger aperture during grasping was affected by both object size and orientation. This latter result was not due to a distorted size perception, as shown by a control matching experiment. Taken together, the results of the present study suggest the integration between distal and proximal components during reaching and grasping.
受试者需要伸手抓取一个平行六面体，其位置、方向和大小均有所变化。在全视觉和无视觉条件下研究了伸手和抓握动作的运动学。伸手的方向和运动幅度均受物体方向的影响。相反，手指轴方向的时间进程和手腕处手部的角位移均受物体位置的影响。这些结果在没有视觉控制的情况下并未改变。抓握过程中的手指开度受物体大小和方向的影响。如对照匹配实验所示，后一结果并非由于大小感知失真所致。综上所述，本研究结果表明在伸手和抓握过程中远端和近端成分之间存在整合。
