Dynamics of population coding for object views following object discrimination training
Dynamics of population coding for object views following object discrimination training
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对象辨别训练后对象视图的群体编码动态
DOI：
10.1016/j.neuroscience.2016.05.039
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发表时间：
2016
期刊：
影响因子：
3.3
通讯作者：
Gang Wang
中科院分区：
文献类型：
--
作者：
Reona Yamaguchi;Jun-ya Okamura;Gang Wang
我们以前已经证明，即使在没有任何先前学习视图之间联系的经验的情况下，颞下神经元也会对从一系列角度观察的对象做出反应。已经提出了几个模型来解释跨不同视图的对象识别。然而，直接的神经元证据是罕见的。在这项研究中，我们根据不同的先前经验，重点研究了一群颞下细胞对对象视图的反应相似性。两只猴子接受了一项任务，在这项任务中，对象需要跨越不同的视角进行区分。我们发现，在物体图像呈现后的190毫秒内，对于30°分离的视图，神经反应相似性显著高于没有任何先前的跨视图区分经验。对于190-850ms的60°分离视图，相似性显著的时间段开始并持续类似。对于90°分离视图，相似性显著的时间段较短且开始较晚，在230-550ms之间。这些结果展示了细胞群体活动的动态，并为跨不同视图的对象识别提供了可能的解释。
We have previously demonstrated that inferotemporal neurons respond to objects viewed from a range of angles, even without any prior experience in learning the associations among the views. Several models have been proposed to explain object recognition across disparate views. However, direct neuronal evidence is rare. In the present study, we focused on the response similarity of a population of inferotemporal cells to object views, following different prior experiences. Two monkeys were subjected to a task in which object discrimination across views was required. We found significantly higher neural response similarity to 30° separated views, 190 ms after object image presentation, than without any prior discrimination experience across views. The time period over which the similarity was significant began and endured similarly for 60° separated views at 190–850 ms. For 90° separated views, the time period over which the similarity was significant was shorter and started later, at 230–550 ms. The results demonstrate the dynamics of cell population activity and suggest a possible explanation for object recognition across disparate views.