Anticipatory remapping of attentional priority across the entire visual field.
Anticipatory remapping of attentional priority across the entire visual field.
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整个视野中注意力重点的预期重新映射。
DOI：
10.1523/jneurosci.2008-12.2012
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发表时间：
2012-11-14
期刊：
影响因子：
--
通讯作者：
Bisley JW
中科院分区：
文献类型：
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作者：
Mirpour K;Bisley JW
有人建议，我们可以通过多次眼球运动建立对视觉世界的稳定感知的一种方式是，在每次眼球运动的时间左右，将信息从一组神经元传递到另一组神经元。以前的研究表明，外侧顶内区(LIP)的一些神经元表现出预期性的重新映射：这些神经元对刺激产生视觉反应，在扫视后进入它们的接受野，但在实际进入之前。注视过程中的嘴唇反应被认为代表了注意力的优先顺序、行为相关性或价值。在这项研究中，我们通过检测动物执行视觉觅食任务时嘴唇神经元的活动，来测试重新映射的反应是否代表了这种注意优先级。我们发现，在眼跳开始将刺激带入接受区之前，人群对目标的反应比对分心的反应更多。在眼跳结束后的20毫秒内，几乎三分之一的嘴唇神经元的反应与稳定注视时出现的反应非常相似。最后，我们表明，在这些神经元和整个群体中，这种重新映射发生在视野中所有位置的所有刺激以及长和短眼跳。我们的结论是，这种视场中注意力优先级的完全重新映射可能是跨眼跳的空间稳定性的基础。
It has been suggested that one way we may create a stable percept of the visual world across multiple eye movements is to pass information from one set of neurons to another around the time of each eye movement. Previous studies have shown that some neurons in the lateral intraparietal area (LIP) exhibit anticipatory remapping: these neurons produce a visual response to a stimulus that will enter their receptive field after a saccade, but before it actually does so. LIP responses during fixation are thought to represent attentional priority, behavioral relevance or value. In this study, we test whether the remapped response represents this attentional priority, by examining the activity of LIP neurons while animals perform a visual foraging task. We find that the population responds more to a target than to a distractor before the saccade even begins to bring the stimulus into the receptive field. Within 20 ms of the saccade ending, the responses in almost a third of LIP neurons closely resemble the responses that will emerge during stable fixation. Finally, we show that in these neurons and in the population as a whole, this remapping occurs for all stimuli in all locations across the visual field and for both long and short saccades. We conclude that this complete remapping of attentional priority across the visual field could underlie spatial stability across saccades.