Ventral Tegmental Dopamine Neurons Control the Impulse Vector during Motivated Behavior.

Ventral Tegmental Dopamine Neurons Control the Impulse Vector during Motivated Behavior.
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腹侧换取多巴胺神经元在动机行为过程中控制脉冲载体。

DOI:
10.1016/j.cub.2020.05.003
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发表时间:
2020-07-20
期刊:
Current biology : CB
影响因子:
--
通讯作者:
Yin HH
Yin HH
中科院分区:
其他
文献类型:
--
作者:
Hughes RN;Bakhurin KI;Petter EA;Watson GDR;Kim N;Friedman AD;Yin HH

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腹侧被盖区(VTA)是多巴胺的主要来源,尤其是边缘脑区。尽管经过了几十年的研究,但VTA多巴胺神经元的功能仍然存在争议。在这里,使用一个具有五个正交力传感器的新型头部固定行为系统,我们首次证明了多巴胺神经元的活动准确地代表了动物产生的脉冲向量(随时间施加的力)。VTA多巴胺神经元的不同群体在不同方向上对脉冲向量的成分做出贡献。这些神经元的光发生兴奋在注入的信号和产生的脉冲之间呈现线性关系。光发生抑制暂停了力的产生或产生了向后方向的冲动。同时,这些神经元还调节预期舔的启动和执行。我们的结果表明,VTA多巴胺控制着用来靠近或远离任何与动机相关的刺激的力量的大小、方向和持续时间。VTA多巴胺双向控制冲动向量和预期行为
The Ventral Tegmental Area (VTA) is a major source of dopamine, especially to the limbic brain regions. Despite decades of research, the function of VTA dopamine neurons remains controversial. Here, using a novel head-fixed behavioral system with five orthogonal force sensors, we show for the first time that the activity of dopamine neurons precisely represents the impulse vector (force exerted over time) generated by the animal. Distinct populations of VTA dopamine neurons contribute to components of the impulse vector in different directions. Optogenetic excitation of these neurons shows a linear relationship between signal injected and impulse generated. Optogenetic inhibition paused force generation or produced impulse in the backward direction. At the same time, these neurons also regulate the initiation and execution of anticipatory licking. Our results indicate that VTA dopamine controls the magnitude, direction, and duration of force used to move towards or away from any motivationally relevant stimuli. VTA dopamine bidirectionally controls impulse vector and anticipatory behavior
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