Spatially confined dopamine from locus coeruleus axons selectively shapes hippocampal dynamics and action timing
Luo, D.; Cao, J.; Heldman, R.; Tian, L.; Wang, Y. · neuroscience · 2026-09-07 · 原文
DOI：10.64898/2026.09.02.748730作者：5 位
Neuromodulatory systems project broadly, yet computations engage specific neuronal populations. Whether neuromodulation can selectively influence task-engaged neurons remains unclear. During goal-directed navigation, neurons in the locus coeruleus (LC), the brain's principal norepinephrine source, responded at navigation onset. Concurrently, dopamine transients arose in micrometer-scale domains around LC axons in CA1. These transients preferentially enhanced nearby CA1 neurons with ramping dynamics, whose higher activity predicted later reward-anticipatory action. Brief LC activation evoked local dopamine, enhanced ramping dynamics, and delayed action initiation seconds later. Blocking D1-like, but not adrenergic, receptors weakened ramping dynamics and impaired reward anticipation. Modeling showed that selectivity can emerge when localized dopamine coincides with strong ongoing neuronal activity, without dedicated wiring. Thus, a widely projecting system can selectively modulate task-engaged neurons and shape behavior.
讲义
讲义·推断 依据「原文」自动生成的结构化摘要（推断），非原文表述；以原文为准。
1. 人话版
Neuromodulatory systems project broadly, yet computations engage specific neuronal populations.
Whether neuromodulation can selectively influence task-engaged neurons remains unclear.
2. 领域脉络
本文类目：neuroscience，属于其所在研究脉络的最新进展。
3. 机制拆解
During goal-directed navigation, neurons in the locus coeruleus (LC), the brain's principal norepinephrine source, responded at navigation onset.
4. 证据与数字
Concurrently, dopamine transients arose in micrometer-scale domains around LC axons in CA1.
These transients preferentially enhanced nearby CA1 neurons with ramping dynamics, whose higher activity predicted later reward-anticipatory action.
Blocking D1-like, but not adrenergic, receptors weakened ramping dynamics and impaired reward anticipation.
5. 反例与边界
摘要未声明局限与反例——这是需要警惕的信号，精读时先问边界。
6. 跨领域连接与意外收获
思考本文机制能否迁移到你正在跟进的问题。
7. 可复用方法
把本文机制与你手头项目对照，找一个两周内能验证的最小实验。
8. 术语表
精读时把不熟的术语记入此处，作为下次回忆的锚点。