小柯机器人

学习过程中眶额集合中不断发展的模式表示
2020-12-25 15:04

美国国家药物滥用研究所Geoffrey Schoenbaum和Jingfeng Zhou研究组合作取得最新进展。他们揭示学习过程中眶额集合中不断发展的模式表示。2020年12月23日出版的《自然》杂志发表了这项成果。

他们表明,使用先验知识来促进学习伴随着眶额皮质中神经模式的演变。从老鼠身上记录了单个单位,该老鼠采用一种模式来学习一系列气味序列问题。通过学习,眶额皮层集合融合到问题和主题的低维神经代码上。这种神经代码表示问题的通用结构,并且在学习过程中加速了其发展。这些结果证明了在前额脑区域中的图式的形成和使用,以支持复杂的认知操作。他们的研究结果不仅揭示了眶额叶皮层在学习中的作用,而且对于使用集合分析来利用复杂的认知功能也具有意义。

人们如何了解要学习的内容?具体而言,大脑中的神经元如何概括在一种情况下所学到的东西,以识别在其他类似情况下的共同结构并加快学习速度?之所以知道发生这种情况,是因为人类会通过经验来更好地解决新问题-学习和部署模式。但是,人们对此过程知之甚少。

附:英文原文

Title: Evolving schema representations in orbitofrontal ensembles during learning

Author: Jingfeng Zhou, Chunying Jia, Marlian Montesinos-Cartagena, Matthew P. H. Gardner, Wenhui Zong, Geoffrey Schoenbaum

Issue&Volume: 2020-12-23

Abstract: How do we learn about what to learn about Specifically, how do the neural elements in our brain generalize what has been learned in one situation to recognize the common structure of—and speed learning in—other, similar situations We know this happens because we become better at solving new problems—learning and deploying schemas1,2,3,4,5—through experience. However, we have little insight into this process. Here we show that using prior knowledge to facilitate learning is accompanied by the evolution of a neural schema in the orbitofrontal cortex. Single units were recorded from rats deploying a schema to learn a succession of odour-sequence problems. With learning, orbitofrontal cortex ensembles converged onto a low-dimensional neural code across both problems and subjects; this neural code represented the common structure of the problems and its evolution accelerated across their learning. These results demonstrate the formation and use of a schema in a prefrontal brain region to support a complex cognitive operation. Our results not only reveal a role for the orbitofrontal cortex in learning but also have implications for using ensemble analyses to tap into complex cognitive functions.

DOI: 10.1038/s41586-020-03061-2

Source: https://www.nature.com/articles/s41586-020-03061-2#Bib1

Nature:《自然》,创刊于1869年。隶属于施普林格·自然出版集团,最新IF:43.07
官方网址:http://www.nature.com/
投稿链接:http://www.nature.com/authors/submit_manuscript.html


本期文章:《自然》:Online/在线发表

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