在VTA刺激神经元控制奖励驱动的行为,通过调节的内膜皮层发射
Tolulope Adeyelu1, Tashonda Vaughn2, Olalekan M Ogundele1
1Department of Comparative Biomedical Sciences, Louisiana State University School of Veterinary Medicine, Baton Rouge, LA 70803, United States.
Neuroscience
|March 21, 2024
概括
腹膜区域 (VTA) 通过调节中间前额叶皮质 (mPFC) 来影响奖励学习. VTA谷氨酸神经元有助于在mPFC中建立抑制状态,用于奖励编码和关联.
科学领域:
- 神经科学是一个神经科学.
- 行为神经科学 行为神经科学
- 计算神经科学是一种神经科学.
背景情况:
- 中间前额叶皮层 (mPFC) 在惩罚与奖励任务中表现出功能上的差异.
- 在mPFC内部的内膜皮层 (IL) 与行为抑制有关.
- 腹膜区域 (VTA) 对于奖励和厌恶学习至关重要,但其与IL奖励编码的联系尚不清楚.
研究的目的:
- 研究VTA刺激神经元在IL编码奖励相关行为中的作用.
- 阐明基于人群的机制,是IL中奖励获取和协会的基础.
- 确定VTA谷氨酸神经元活动如何影响IL发射率和对奖励的行为反应.
主要方法:
- 在寻求奖励的任务中记录神经元活动.
- 使用化学遗传学 (抑制) 操纵VTA谷氨酸神经元活动.
- 在奖励获取和遗漏阶段分析IL合集的火速 (FR) 变化.
- 评估对以前得到奖励的目标的行为亲和力.
主要成果:
- 在奖励获取和预期期间,IL合奏显示了广泛的射击率抑制.
- 这种FR抑制在奖励相关事件发生后仍然存在.
- 在奖励获取过程中抑制VTA谷氨酸神经元削弱了奖励-目标关联,通过减少亲和力和改变IL神经元活动模式来表明.
- 较少的IL神经元表现出FR降低,当VTA谷氨酸被抑制时,更多的神经元显示没有变化.
结论:
- VTA谷氨酸神经元在建立IL抑制状态方面发挥着关键作用,这对于编码奖励获取至关重要.
- 这些VTA-IL互动对于形成和表达奖励目标协会至关重要.
- 这些发现突出了一个神经机制,通过它在大脑中处理奖励学习.
更多相关视频
05:50Two Different Real-Time Place Preference Paradigms Using Optogenetics within the Ventral Tegmental Area of the Mouse
Published on: February 12, 2020
13.5K
08:07Simultaneous Detection of c-Fos Activation from Mesolimbic and Mesocortical Dopamine Reward Sites Following Naive Sugar and Fat Ingestion in Rats
Published on: August 24, 2016
9.1K
相关概念视频
01:27Diencephalon: Thalamus and Information Relay
1.6K
The thalamus, often called “the gateway to the cerebral cortex,” is vital in processing and directing sensory and motor signals throughout the brain. Almost all inputs destined for the cerebral cortex, except for olfactory signals, are relayed through the thalamus. The thalamus is a sophisticated relay station, channeling information from various brain regions to the cerebral cortex, as well as a filter, prioritizing certain signals over others based on current physiological...
1.6K
01:30Regulation of Food Intake
228
Short-term regulation of food intake primarily involves neural signals from the gastrointestinal (GI) tract, blood nutrient levels, and GI tract hormones. Communication between the gut and brain via vagal nerve fibers plays a significant role in evaluating the contents of the gut. Clinical studies have shown that protein ingestion produces a more prolonged response in these nerve fibers compared to an equivalent amount of glucose. Additionally, the activation of stretch receptors caused by GI...
228
01:19The Role of Ion Channels in Neuronal Computation
3.2K
A postsynaptic neuron usually receives numerous impulses from several other presynaptic neurons. The axon hillock of the postsynaptic neuron integrates all these signals and determines the likelihood of firing an action potential.
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential....
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential....
3.2K