Reach plans in eye-centered coordinates
Reach plans in eye-centered coordinates
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DOI：
10.1126/science.285.5425.257
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发表时间：
1999-07-09
期刊：
影响因子：
56.9
通讯作者：
Andersen, RA
中科院分区：
文献类型：
--
作者：
Batista, AP;Buneo, CA;Andersen, RA
与视觉引导的到达相关联的神经事件开始于视网膜上的图像，并且结束于对肌肉的脉冲。在这两者之间，形成到达计划。该计划可以在手臂的坐标中，指定运动的方向和幅度，或者它可以在眼睛的坐标中，因为视觉信息最初在该参考系中收集。在后顶叶皮层的到达规划区域，神经活动被发现与以眼睛为中心的编码比以手臂为中心的编码更一致。以眼睛为中心的参考系中的手臂运动的编码是有利的，因为影响规划的障碍物以及到达中的误差在该参考系中被登记。此外，眼睛运动是在眼睛坐标中规划的，并且使用类似的坐标来达到可以促进手眼协调。
The neural events associated with visually guided reaching begin with an image on the retina and end with impulses to the muscles, In between, a reaching plan is formed, This plan could be in the coordinates of the arm, specifying the direction and amplitude of the movement, or it could be in the coordinates of the eye because visual information is initially gathered in this reference frame. In a reach-planning area of the posterior parietal cortex, neural activity was found to be more consistent with an eye-centered than an arm-centered coding of reach targets. Coding of arm movements in an eye-centered reference frame is advantageous because obstacles that affect planning as well as errors in reaching are registered in this reference frame. Also, eye movements are planned in eye coordinates, and the use of similar coordinates for reaching may facilitate hand-eye coordination.