Activity in LIP, But not V4, Matches Performance When Attention is Spread.
Activity in LIP, But not V4, Matches Performance When Attention is Spread.
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当注意力分散时，LIP 中的活动（而非 V4）与性能相匹配。
DOI：
10.1093/cercor/bhx274
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
Bisley,JamesW
中科院分区：
文献类型：
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作者：
Arcizet,Fabrice;Mirpour,Koorosh;Foster,DanielJ;Bisley,JamesW
在动物执行空间注意任务时，许多视觉区域的神经元反应增强被广泛认为是视觉注意的神经相关性，但目前尚不清楚这种调制的存在或不存在是否有助于我们在变化盲视的例子中注意到变化。我们询问视觉区V4和后顶叶皮质外侧顶内区（LIP）的神经元反应是否可以解释受试者注意显示中多个项目的能力有限。我们训练动物执行变化检测任务，在该任务中，它们必须比较2个在时间上短暂分离的刺激阵列，并发现每个动物的表现随着集合大小的函数而下降。神经元的辨别力在V4是一致的设置大小，但降低了更高的设置大小在LIP。在V4中，奖励偏向的引入产生了注意力的增强，但这不能解释表现的巨大改善，而LIP反应的增强可以解释。我们认为，集中注意力的行为集大小的影响和性能的显着改善可能不相关的响应增强V4，但相反，可能会发生在或LIP的方式。
The enhancement of neuronal responses in many visual areas while animals perform spatial attention tasks has widely been thought to be the neural correlate of visual attention, but it is unclear whether the presence or absence of this modulation contributes to our striking inability to notice changes in change blindness examples. We asked whether neuronal responses in visual area V4 and the lateral intraparietal area (LIP) in posterior parietal cortex could explain the limited ability of subjects to attend multiple items in a display. We trained animals to perform a change detection task in which they had to compare 2 arrays of stimuli separated briefly in time and found that each animal’s performance decreased as function of set-size. Neuronal discriminability in V4 was consistent across set-sizes, but decreased for higher set-sizes in LIP. The introduction of a reward bias produced attentional enhancement in V4, but this could not explain the vast improvement in performance, whereas the enhancement in LIP responses could. We suggest that behavioral set-size effects and the marked improvement in performance with focused attention may not be related to response enhancement in V4 but, instead, may occur in or on the way to LIP.