Behaviorally relevant decision coding in primary somatosensory cortex neurons.

Behaviorally relevant decision coding in primary somatosensory cortex neurons.
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DOI:
10.1038/s41593-022-01151-0
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发表时间:
2022-09
影响因子:
25
通讯作者:
Häusser M
Häusser M
中科院分区:
医学1区
文献类型:
--
作者:
Buetfering C;Zhang Z;Pitsiani M;Smallridge J;Boven E;McElligott S;Häusser M

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初级感觉皮层被认为处理传入的感觉信息,而对驾驶行为重要的决策变量被认为在处理层次的下游出现。在纹理识别任务中,我们使用群体双光子钙成像和靶向双光子光遗传刺激小鼠初级体感觉皮层(S1)第2/3层的神经元来测试决策信号的存在并探讨其行为相关性。小而独特的神经元群体携带着与行为结果无关的刺激信息(“刺激神经元”),或者与呈现的刺激无关的选择信息(“决策神经元”)。决策神经元在学习过程中表现出分类编码,在失误试验中缺乏决定性的决策信号。决策神经元的全光刺激改善了行为表现,在驾驶行为中建立了因果关系。刺激神经元和决策神经元混合的事实挑战了S1作为纯粹感觉区域的想法,因果扰动表明S1决策神经元直接参与决策过程。
Primary sensory cortex is thought to process incoming sensory information, while decision variables important for driving behavior are assumed to arise downstream in the processing hierarchy. We used population two-photon calcium imaging and targeted two-photon optogenetic stimulation of neurons in layer 2/3 of mouse primary somatosensory cortex (S1) during a texture discrimination task to test for the presence of decision signals and probe their behavioral relevance. Small but distinct populations of neurons carried information about the stimulus irrespective of the behavioral outcome (‘stimulus neurons’), or about the choice irrespective of the presented stimulus (‘decision neurons’). Decision neurons show categorical coding that develops during learning, and lack a conclusive decision signal in miss trials. All-optical photostimulation of decision neurons improves behavioral performance, establishing a causal role in driving behavior. The fact that stimulus and decision neurons are intermingled challenges the idea of S1 as a purely sensory area, and causal perturbation suggests a direct involvement of S1 decision neurons in the decision-making process.
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