Ventral Tegmental Dopamine Neurons Control the Impulse Vector during Motivated Behavior.
Ventral Tegmental Dopamine Neurons Control the Impulse Vector during Motivated Behavior.
复制标题
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:
影响因子:
--
通讯作者:
Yin HH
中科院分区:
文献类型:
--
作者:
Hughes RN;Bakhurin KI;Petter EA;Watson GDR;Kim N;Friedman AD;Yin HH
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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