THE ROLE OF BINOCULAR VISION IN PREHENSION - A KINEMATIC ANALYSIS
THE ROLE OF BINOCULAR VISION IN PREHENSION - A KINEMATIC ANALYSIS
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DOI：
10.1016/0042-6989(92)90207-y
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发表时间：
1992-08-01
期刊：
影响因子：
1.8
通讯作者：
JAKOBSON, LS
中科院分区：
文献类型：
--
作者：
SERVOS, P;GOODALE, MA;JAKOBSON, LS
本研究考察了双眼视觉对人类抓取控制的贡献。在单眼或双眼视觉条件下，受试者伸出手并抓住长方形块。运动学分析表明，单目观察下的抓握运动与双目观察下的抓握运动有很大不同。特别是，单目观察条件下的抓握运动比双眼观察条件下的抓握运动表现出更长的运动时间、更低的峰值速度、成比例的更长的减速阶段和更小的抓握孔径。简而言之，在单目观察下，受试者似乎低估了物体的距离（以及它们的大小）。本文认为，两种观察条件下的表现差异很大程度上反映了在运动开始之前对目标大小和距离的估计差异。这项研究提供了第一个明确的运动学证据，证明双目视觉（立体视觉和可能的收敛视觉）对人类可抓握运动的精确规划做出了重大贡献。
This study examined the contribution of binocular vision to the control of human prehension. Subjects reached out and grasped oblong blocks under conditions of either monocular or binocular vision. Kinematic analyses revealed that prehensile movements made under monocular viewing differed substantially from those performed under binocular conditions. In particular, grasping movements made under monocular viewing conditions showed longer movement times, lower peak velocities, proportionately longer deceleration phases, and smaller grip apertures than movements made under binocular viewing. In short, subjects appeared to be underestimating the distance of objects (and as a consequence, their size) under monocular viewing. It is argued that the differences in performance between the two viewing conditions were largely a reflection of differences in estimates of the target's size and distance obtained prior to movement onset. This study provides the first clear kinematic evidence that binocular vision (stereopsis and possibly vergence) makes a significant contribution to the accurate programming of prehensile movements in humans.