中脑多巴胺神经元控制时间判断
Sofia Soares1, Bassam V Atallah2, Joseph J Paton2
1Champalimaud Research, Champalimaud Centre for the Unknown, Lisbon, Portugal.
概括
中脑中的多巴胺神经元直接影响我们对时间的感知. 操纵这些多巴胺神经元改变小鼠
科学领域:
- 神经科学
- 认知科学
- 时间生物学
背景情况:
- 主观时间感知因情感和认知状态而有所不同.
- 中脑多巴胺神经元被假设在时间估计中起作用.
- 多巴胺神经元活动与时间判断之间的直接因果关系仍未确立.
研究的目的:
- 调查中脑多巴胺神经元在时间感知中的因果作用.
- 确定多巴胺神经元活动是否编码时间信息并影响时间判断.
主要方法:
- 使用药物遗传技术操纵小鼠的多巴胺神经元活动.
- 在持续判断任务中测量对时间间隔的行为敏感性.
- 记录和分析与时间估计相关的多巴胺神经元活动.
主要成果:
- 抑制多巴胺神经元会降低对时间持续时间的行为敏感性.
- 多巴胺神经元活动与时间估计的试验变化相关.
- 多巴胺神经元的暂时激活或抑制直接改变了时间估计的速度.
结论:
- 中脑多巴胺神经元活动是时间感知的关键组成部分.
- 多巴胺神经元不仅反映,而且因果控制时间的主观体验.
- 这些发现为多巴胺在时间认知中的作用提供了直接证据.
相关概念视频
Diencephalon: Thalamus and Information Relay
5.1K
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...
5.1K
Brainstem
7.5K
The brainstem, located inferior to the brain and superior to the spinal cord, serves as a bridge between the cerebrum and the spinal cord. It plays a vital role in relaying information and controlling critical life functions. It comprises three primary regions: the midbrain, pons, and medulla oblongata.
The Midbrain
The midbrain is located beneath the diencephalon and connects the cerebrum with the lower parts of the brain. The cerebral peduncles are prominent midbrain structures that house the...
The Midbrain
The midbrain is located beneath the diencephalon and connects the cerebrum with the lower parts of the brain. The cerebral peduncles are prominent midbrain structures that house the...
7.5K
Organization of the Brain
3.0K
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...
3.0K
Diencephalon: Anatomical Regions
6.2K
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...
6.2K
Brainstem: Control Centers of Medulla
5.1K
The medulla oblongata is a crucial part of the brainstem responsible for controlling various autonomic and involuntary functions. It contains several nuclei, including the olivary, cuneate, gracile, and solitary nuclei.
Olivary Nucleus
The olivary nucleus, or inferior olivary nucleus, is located within the ventrolateral part of the medulla oblongata. It is primarily involved in motor coordination and motor learning. The olivary nucleus receives input from the spinal cord, cerebellum, and motor...
Olivary Nucleus
The olivary nucleus, or inferior olivary nucleus, is located within the ventrolateral part of the medulla oblongata. It is primarily involved in motor coordination and motor learning. The olivary nucleus receives input from the spinal cord, cerebellum, and motor...
5.1K
Diencephalon: Hypothalamus and Coordination
4.9K
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...
4.9K


