A reservoir of foraging decision variables in the mouse brain.

A reservoir of foraging decision variables in the mouse brain.
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DOI:
10.1038/s41593-023-01305-8
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发表时间:
2023-05
影响因子:
25
通讯作者:
Mainen, Zachary F. F.
Mainen, Zachary F. F.
中科院分区:
医学1区
文献类型:
--
作者:
Cazettes, Fanny;Mazzucato, Luca;Murakami, Masayoshi;Morais, Joao P. P.;Augusto, Elisabete;Renart, Alfonso;Mainen, Zachary F. F.

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在任何给定的情况下,可以以不同的方式解析环境,以产生定义对不同任务有用的策略的决策变量(DV)。一般认为,大脑只计算定义当前行为策略的单个DV。为了验证这一假设,我们记录了接受多个DV的觅食任务的小鼠额叶皮层中的神经集合。开发的方法,以揭示目前采用的DV显示使用多种策略和偶尔开关的策略会话内。光遗传学操作表明,小鼠在任务中使用不同的DV需要次级运动皮层(M2)。令人惊讶的是,我们发现,无论哪种DV最好地解释了当前的行为,M2活动都同时编码了一组完整的计算基础,定义了一个适合替代任务的DV库。这种形式的神经复用可以为学习和适应行为带来相当大的优势。
In any given situation, the environment can be parsed in different ways to yield decision variables (DVs) defining strategies useful for different tasks. It is generally presumed that the brain only computes a single DV defining the current behavioral strategy. Here to test this assumption, we recorded neural ensembles in the frontal cortex of mice performing a foraging task admitting multiple DVs. Methods developed to uncover the currently employed DV revealed the use of multiple strategies and occasional switches in strategy within sessions. Optogenetic manipulations showed that the secondary motor cortex (M2) is needed for mice to use the different DVs in the task. Surprisingly, we found that regardless of which DV best explained the current behavior, M2 activity concurrently encoded a full basis set of computations defining a reservoir of DVs appropriate for alternative tasks. This form of neural multiplexing may confer considerable advantages for learning and adaptive behavior.
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