前额前垂体 - - 脑下垂体 - - 中脑电路的动态状态指令行为过渡
Changwan Chen1,2, Mahsa Altafi3, Mihaela-Anca Corbu1,2
1Max Planck Institute for Metabolism Research, Cologne, Germany.
Nature neuroscience
|March 19, 2024
概括
研究人员在侧向下丘脑 (LH) 中发现了一种大脑机制,该机制向即将出现的先天性行为发出信号. 这种与贝塔振荡相关的神经活动有助于选择和过渡,例如饮食和社交接触.
科学领域:
- 神经科学是一个神经科学.
- 行为生物学 行为生物学
- 计算神经科学是一种神经科学.
背景情况:
- 天生的行为对生存至关重要,顺序地适应多种需求.
- 协调行为过渡的神经机制仍然不太了解.
- 一个特定的大脑动态整合未来的行为表征是假设的,但没有确定.
研究的目的:
- 识别行为转变背后的神经动力学.
- 研究侧向下丘脑 (LH) 在选择即将出现的先天性行为中的作用.
- 阐明下丘脑活动与认知/奖励回路之间的协调.
主要方法:
- 利用光遗传学在行为过渡期间操纵LH中的神经元活动.
- 在LH中记录了神经元群体特征和β振荡.
- 研究了前额叶皮层和下游多巴胺神经元活动的输入.
主要成果:
- 在LH中确定了特定的神经元签名,在β振荡峰值期间活跃,编码可能的即将发生的行为.
- 在这些峰值期间的光遗传抑制取消了行为过渡.
- 发现前额叶皮层的β-节律输入与LH"过渡细胞"同步.
- 观察到多巴胺神经元发射的增加和贝塔振荡期间行为过渡的编码.
结论:
- 下丘脑的"过渡状态"动态地信号并编码替代的未来行为.
- 这种状态使适应性行动与认知和奖励系统的快速协调成为可能.
- 这些发现揭示了选择和执行先天性行为的神经机制.
相关概念视频
Diencephalon: 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
High-Level and Low-Level Awareness
265
Controlled processes in human consciousness represent high-alert mental states where individuals deliberately focus their attention on achieving specific goals. Controlled processes can be seen in situations like mastering new technology, where a person might become so absorbed that they ignore surrounding distractions. Such processes involve selective attention, requiring one to concentrate on particular elements of experience while disregarding others. These are governed by executive...
265
Diencephalon: Hypothalamus and Coordination
1.5K
The hypothalamus is a small yet highly complex and essential brain region that plays a crucial role in regulating various bodily functions. Anatomically, it is located at the base of the brain, just above the brainstem and below the thalamus, forming part of the limbic system.
The hypothalamus interacts with other brain regions, including the pituitary gland, through a direct physical connection called the hypothalamic-pituitary axis. The hypothalamus receives somatic and visceral inputs and...
The hypothalamus interacts with other brain regions, including the pituitary gland, through a direct physical connection called the hypothalamic-pituitary axis. The hypothalamus receives somatic and visceral inputs and...
1.5K
Diencephalon: Anatomical Regions
1.9K
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 the...
1.9K
Functional Brain Systems: Reticular Formation
1.9K
The reticular formation is a complex network of gray and white matter located within the brainstem extending from the medulla to the midbrain.
Within the reticular formation, there are several distinct nuclei that can be classified into three broad categories. The Raphe nuclei are located along the midline of the brainstem. They are primarily known for their role in synthesizing and releasing serotonin, a neurotransmitter involved in regulating mood, appetite, sleep, and circadian rhythms. The...
Within the reticular formation, there are several distinct nuclei that can be classified into three broad categories. The Raphe nuclei are located along the midline of the brainstem. They are primarily known for their role in synthesizing and releasing serotonin, a neurotransmitter involved in regulating mood, appetite, sleep, and circadian rhythms. The...
1.9K
Hierarchy of Motor Control
2.7K
The hierarchy of motor control refers to the different levels of organization and processing involved in controlling movement in the body. These levels range from higher cortical areas involved in planning and decision-making to lower spinal cord reflexes that respond automatically to external stimuli.
2.7K


