腹部体区域的多巴胺神经活动与前额叶皮层和海马体中的规则表示同时切换
Mingxin Ding1, Porter L Tomsick2,3, Ryan A Young4
1Graduate Program in Neuroscience, Brandeis University, Waltham, MA 02453, USA.
bioRxiv : the preprint server for biology
|September 24, 2024
概括
大脑区域协调以适应行为. 多巴胺信号在规则变化期间与海马和前额叶皮层活动保持一致,从而使行为适应.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 行为神经科学 行为神经科学
背景情况:
- 认知灵活性和行为适应依赖于多个大脑区域的协调活动.
- 海马 (HPC) 和前额叶皮质 (PFC) 对空间背景和适应改变的奖励和规则至关重要.
- 中脑多巴胺 (DA) 在寻求奖励的行为和学习中起着至关重要的作用,调节HPC和PFC活动.
研究的目的:
- 研究海马,前额头和多巴胺网络之间的动态和时间协调,在行为适应改变奖励规则的过程中.
- 确定多巴胺奖励预测变化和规则转换期间PFC和CA1中的规则表示转移之间的关系.
主要方法:
- 在雄性TH-Cre大鼠中,从海马区域CA1,PFC和腹膜区域 (VTA) 同时记录神经元群活动.
- 使用空间工作记忆任务,在试验区块中频繁切换规则.
- 使用光遗传标记的VTA多巴胺神经元来跟踪奖励预测和结果.
主要成果:
- 在迷宫导航和奖励网站上,CA1和PFC神经元组合表现出规则特定的活动,PFC规则编码在各个受试者之间更一致.
- VTA多巴胺神经元发射活动响应并预测奖励结果,在规则切换后,正确的预测逐渐出现.
- 在多巴胺奖励预测的逐渐出现,PFC/CA1规则表示中的过渡和随后的行为适应之间观察到时间协调.
结论:
- 这项研究表明,PFC/CA1中神经代表规则,基于多巴胺的奖励信号和行为策略的适应之间存在关键的时间协调.
- 这种协调对于认知灵活性和在环境突发事件发生变化时成功的行为调整至关重要.
- 这些发现突出了海马,前额叶和多巴胺系统在适应性决策中的综合功能.
更多相关视频
09:36Combined In Vivo Anatomical and Functional Tracing of Ventral Tegmental Area Glutamate Terminals in the Hippocampus
Published on: September 9, 2020
3.8K
06:40Combined Infusion and Stimulation with Fast-Scan Cyclic Voltammetry CIS-FSCV to Assess Ventral Tegmental Area Receptor Regulation of Phasic Dopamine
Published on: April 23, 2020
3.1K
相关概念视频
Diencephalon: Anatomical Regions
1.7K
The diencephalon, etymologically translated as 'through brain,' plays an integral role as the conduit between the cerebrum and the vast extent of the nervous system. However, the olfactory system is an exception, as it interfaces directly with the cerebrum. The diencephalon, deeply ensconced beneath the cerebrum, primarily consists of three paired structures — the thalamus, hypothalamus, and epithelamus. It also includes accessory structures such as the subthalamus, which houses...
1.7K
Organization of the Brain
745
The brain is an integral component of the nervous system and serves as the center for processing sensory inputs, making decisions, and directing bodily actions. This complex organ is organized into three primary sections: the hindbrain, midbrain, and forebrain, each responsible for a range of vital functions.
Hindbrain
The hindbrain, located at the base of the brain, plays a vital role in regulating automatic processes that sustain life. It includes the medulla oblongata, which is essential for...
Hindbrain
The hindbrain, located at the base of the brain, plays a vital role in regulating automatic processes that sustain life. It includes the medulla oblongata, which is essential for...
745
Motor and Sensory Areas of the Cortex
3.3K
The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor...
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor...
3.3K
Association Areas of the Cortex
5.1K
Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
5.1K
Diencephalon: Thalamus and Information Relay
1.5K
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...
1.5K
Functional Brain Systems: Limbic System
2.4K
The limbic system, often called the "emotional brain," is a complex set of structures located deep within the brain. The intricate network of the limbic system supports a wide range of psychological functions, from emotional regulation to memory formation and sensory processing. This functional brain region encompasses specific parts of the diencephalon and the cerebrum, integrating the higher mental functions of the cerebral cortex with the primitive emotional responses of the deep...
2.4K
