NEURONAL CORRELATES OF INFERRED MOTION IN PRIMATE POSTERIOR PARIETAL CARTER
NEURONAL CORRELATES OF INFERRED MOTION IN PRIMATE POSTERIOR PARIETAL CARTER
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DOI：
10.1038/373518a0
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发表时间：
1995-02-09
期刊：
影响因子：
64.8
通讯作者：
MAUNSELL, JHR
中科院分区：
文献类型：
--
作者：
ASSAD, JA;MAUNSELL, JHR
对于许多类型的行为，有必要监视暂时被遮挡的对象的位置或移动。灵长类后顶叶皮层包含在视觉引导任务中活跃的神经元：在某些情况下，即使视觉目标短暂消失（1，2）。有人提出，这类活动可能与当前或计划的眼球运动有关（1，2），但它也可能提供目标空间分布的更一般化的抽象表示，即使它们不可见。我们记录了猴子的后顶叶皮层，当动物看到一个消失的视觉刺激时，然后，根据实验背景，可以推断出它是移动的还是静止的。在暂时没有刺激的情况下，大约有一半的神经元在那些可以假定刺激是移动而不是静止的试验中被发现明显更活跃。因此，在没有感觉输入或运动输出的情况下，这种活动是存在的，这表明它可能确实构成了目标运动的一般化表征。
FOR many types of behaviours, it is necessary to monitor the position or movement of objects that are temporarily occluded. The primate posterior parietal cortex contains neurons that are active during visual guidance tasks: in some cases, even if the visual target disappears transiently(1,2). It has been proposed that activity of this sort could be related to current or planned eye movements(1,2), but it might also provide a more generalized abstract representation of the spatial disposition of targets, even when they are not visible. We have recorded from monkey posterior parietal cortex while the animal viewed a visual stimulus that disappeared, and then, depending on experimental context, could be inferred to be either moving or stationary. During this temporary absence of the stimulus, about half of the neurons were found to be significantly more active on those trials in which the stimulus could be presumed to be moving rather than stationary. The activity was thus present in the absence of either sensory input or motor output, suggesting that it may indeed constitute a generalized representation of target motion.