Geometry of sequence working memory in macaque prefrontal cortex

Geometry of sequence working memory in macaque prefrontal cortex
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猕猴前额叶皮层序列工作记忆的几何结构

DOI:
10.1126/science.abm0204
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发表时间:
2022-02
期刊:
影响因子:
56.9
通讯作者:
Liping Wang
Liping Wang
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Yang Xie;Peiyao Hu;Junru Li;Jingwen Chen;Weibin Song;Xiao-Jing Wang;Tianming Yang;Stanislas Dehaene;Shiming Tang;Bin Min;Liping Wang

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大脑如何在记忆中存储序列仍然是未知的。我们研究了序列工作记忆的神经编码,使用双光子钙成像技术记录了猕猴前额叶皮层中数千个神经元对一系列位置的记忆,然后在延迟后再现。我们发现了一个规则的几何组织:延迟期间的高维神经状态空间可以分解为低维子空间的总和,每个子空间存储给定有序秩的空间位置,这可以推广到新的序列并解释猴子的行为。秩子空间分布在大的重叠的神经组中,序数和空间信息的整合发生在集体水平上,而不是在单个神经元内。因此,一个简单的代表性的几何基础序列工作记忆。
How the brain stores a sequence in memory remains largely unknown. We investigated the neural code underlying sequence working memory using two-photon calcium imaging to record thousands of neurons in the prefrontal cortex of macaque monkeys memorizing and then reproducing a sequence of locations after a delay. We discovered a regular geometrical organization: The high-dimensional neural state space during the delay could be decomposed into a sum of low-dimensional subspaces, each storing the spatial location at a given ordinal rank, which could be generalized to novel sequences and explain monkey behavior. The rank subspaces were distributed across large overlapping neural groups, and the integration of ordinal and spatial information occurred at the collective level rather than within single neurons. Thus, a simple representational geometry underlies sequence working memory.
DOI: 10.1038/nature12160
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