Neuronal correlates of a visual "sense of number" in primate parietal and prefrontal cortices
Neuronal correlates of a visual "sense of number" in primate parietal and prefrontal cortices
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DOI：
10.1073/pnas.1308141110
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发表时间：
2013-07-02
影响因子：
11.1
通讯作者：
Nieder, Andreas
中科院分区：
文献类型：
--
作者：
Viswanathan, Pooja;Nieder, Andreas
“数感”指的是我们凭直觉感知物品数量(数量)的经典观念。然而，在缺乏学习的情况下，大脑是否自发地发出数字信号仍是未知的；因此，我们从数字幼稚的猴子的腹侧顶内沟和背外侧前额叶皮质的神经元进行了记录。这两个大脑区域的神经元对给定数量的项目反应最大，表现出对首选数字的调谐。数字在顶叶腹侧区域编码较早，表明数字信息是从顶叶传递到额叶的。因此，视觉数量在专用的顶额叶网络中自发地被表示为知觉范畴。这个网络可能形成自发数字感觉的生物学基础，使灵长类能够直观地估计视觉项目的数量。
"Sense of number" refers to the classical idea that we perceive the number of items (numerosity) intuitively. However, whether the brain signals numerosity spontaneously, in the absence of learning, remains unknown; therefore, we recorded from neurons in the ventral intraparietal sulcus and the dorsolateral prefrontal cortex of numerically naive monkeys. Neurons in both brain areas responded maximally to a given number of items, showing tuning to a preferred numerosity. Numerosity was encoded earlier in area ventral intraparietal area, suggesting that numerical information is conveyed from the parietal to the frontal lobe. Visual numerosity is thus spontaneously represented as a perceptual category in a dedicated parietofrontal network. This network may form the biological foundation of a spontaneous number sense, allowing primates to intuitively estimate the number of visual items.