Visual information and object size in the control of reaching
Visual information and object size in the control of reaching
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DOI：
10.1080/00222895.1996.9941744
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发表时间：
1996-09-01
影响因子：
1.4
通讯作者：
Robin, DJ
中科院分区：
文献类型：
--
作者：
Berthier, NE;Clifton, RK;Robin, DJ
通过改变可用的视觉信息，研究了视觉在控制到达和抓取中的作用。成年人（N = 7）在具有完整视觉信息、有关目标物体的视觉信息但没有手或周围环境的视觉信息以及没有视觉信息的条件下伸手。使用了四种不同的物体直径。结果表明，随着视觉信息和物体尺寸的减小，受试者使用更长的运动时间，速度更慢，手速分布更不对称。受试者匹配把握孔径物体直径，但过度补偿较大的把握孔径时，视觉信息减少。受试者也有质的不同，达到运动学挑战时，减少视觉信息或较小的物体尺寸。这些结果强调了视觉的目标达到的重要性，并表明受试者不简单规模的任务难度的命令模板。
The role of vision in the control of reaching and grasping was investigated by varying the available visual information. Adults (N = 7) reached in conditions that had full visual information, visual information about the target object but not the hand or surrounding environment, and no visual information. Four different object diameters were used. The results indicated that as visual information and object size decreased, subjects used longer movement times, had slower speeds, and more asymmetrical hand-speed profiles. Subjects matched grasp aperture to object diameter, but overcompensated with larger grasp apertures when visual information was reduced. Subjects also qualitatively differed in reach kinematics when challenged with reduced visual information or smaller object size. These results emphasize the importance of vision of the target in reaching and show that subjects do not simply scale a command template with task difficulty.