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在老鼠大脑中选择,行动和参与的分布式编码

Nicholas A Steinmetz^1,2, Peter Zatka-Haas³, Matteo Carandini⁴

¹Institute of Ophthalmology, University College London, London, UK. nick.steinmetz@gmail.com.

|November 29, 2019

概括

这项研究在视觉任务中绘制了小鼠大脑活动图, 发现与行动相关的神经元普遍存在, 而与选择相关的神经元则局部存在. 整个大脑的活动预测了任务的参与.

科学领域:

神经科学
计算神经科学
系统神经科学

背景情况:

像视觉,选择和行动这样的行为过程源于复杂的神经元活动.
了解编码这些过程的神经元的空间组织对于破译大脑功能至关重要.

研究的目的:

描述小鼠大脑中视觉,选择和行动的神经元的空间分布.
研究不同大脑区域的神经元活动与任务参与的关系.

主要方法:

使用神经像素探测器从大约3万个神经元的高密度记录在小鼠的42个大脑区域.
在视觉区分任务中分析神经元活动,以识别刺激,选择和行为的编码.

主要成果:

与动作相关的神经元活动是非特异性的,几乎在所有记录区域都观察到.
编码视觉刺激和即将到来的选择的神经元被局限于新皮质,基底和中脑.
整个大脑的前刺激活动预测了试验参与,具有明显的皮层下和新皮层模式.

结论:

行为相关变量的神经编码遵循老鼠大脑的特定空间组织原则.
选择信号是罕见的,并以一致的时间出现,而行动信号则分布广泛.
整个大脑活动的不同模式在执行任务时区分了参与与不参与的状态.

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