通过腹髓GABA活性神经元控制REM睡眠
Franz Weber1, Shinjae Chung1, Kevin T Beier2
1Division of Neurobiology, Department of Molecular and Cell Biology, Helen Wills Neuroscience Institute, Howard Hughes Medical Institute, University of California, Berkeley, California 94720, USA.
Nature
|October 8, 2015
概括
研究人员从腹髓发现了一条GABAergic通路,促进了快速眼动 (REM) 睡眠. 激活这些神经元会诱导快速眼睛睡眠,揭示大脑干的一个关键组成部分
科学领域:
- 神经科学
- 睡眠科学
- 神经生物学
背景情况:
- 快速眼动 (REM) 睡眠是大脑巩固记忆和情绪调节的关键状态.
- 大脑干,特别是小马, 已知产生REM睡眠, 但大脑中枢的作用仍然不太清楚.
- GABAergic (γ-aminobutyric-acid-releasing) 神经元具有抑制作用,在调节神经元活动和网络状态方面起着至关重要的作用.
研究的目的:
- 研究腹髓神经元在REM睡眠生成中的因果作用.
- 确定源自脑髓的特定神经通路, 控制快速睡眠.
- 探索大脑干内这些通路的功能连接.
主要方法:
- 在小鼠中对特定的腹髓GABA活性神经元群体进行光遗传学操纵.
- 记录神经元活动与睡眠状态的相关性.
- 双反向追踪可以映射神经元的预测.
主要成果:
- 可靠地诱导和延长REM睡眠期的腹髓GABAerg神经元的光遗传激活.
- 这些神经元的失活抑制了快速眼睛睡眠.
- 这些神经元在REM睡眠 (REMmax) 期间表现出最大的活动,并且在进食和理过程中也表现出最大的活动.
- 鉴定出来自腹髓的单独的形和尾部突出,形突出足以诱导和维持REM睡眠.
结论:
- 一个来自腹髓的GABAergic通道是快速睡眠的强大促进者.
- 这条通路通过向小腿和中脑的投射来控制REM睡眠.
- 这些发现确定了调节REM睡眠的尖端骨髓网络的关键组成部分.
相关概念视频
01:15REM Sleep Behavior Disorder
2.5K
REM Sleep Behavior Disorder (RBD) is a sleep disorder characterized by the absence of muscle paralysis that normally occurs during the REM phase of sleep. This absence allows individuals to physically act out their dreams, which are often vivid and disturbing. Common behaviors exhibited during episodes include kicking, punching, and yelling. These actions can be dangerous, potentially leading to injuries for the person with RBD or their bed partner.
RBD is significantly associated with...
RBD is significantly associated with...
2.5K
01:18Neural Control of Respiration
5.7K
The neural regulation of respiration is a meticulously coordinated process primarily controlled by the respiratory centers located within the brainstem. These centers, composed of specialized neurons, transmit nerve impulses that control the contraction and relaxation of our respiratory muscles.
Respiratory Centers in the Brainstem
Two primary areas comprise the respiratory center: the medullary respiratory center in the medulla oblongata and the pontine respiratory group in the pons. The...
Respiratory Centers in the Brainstem
Two primary areas comprise the respiratory center: the medullary respiratory center in the medulla oblongata and the pontine respiratory group in the pons. The...
5.7K
01:21Brainstem: Control Centers of Medulla
5.4K
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...
5.4K
01:22Physiology of Respiration II: Neurogenic Control of Respiration
2.8K
The neurogenic control of respiration coordinates various neural networks and pathways to regulate breathing rate and depth, meeting the body's oxygen and carbon dioxide exchange requirements. This system adapts to physiological and environmental conditions, ensuring optimal breathing patterns.
Central Control
The brainstem is the primary site of central control, hosting respiratory centers:
Central Control
The brainstem is the primary site of central control, hosting respiratory centers:
2.8K
01:24Sleep-Wake Cycles
3.3K
Sleep is an essential physiological process vital to maintaining overall well-being. The reticular activating system (RAS), a network of neurons in the brainstem, regulates wakefulness and sleep. While it may seem passive, sleep consists of distinct cycles, each with its unique characteristics and functions. Two key sleep phases are non-rapid eye movement (NREM) and rapid eye movement (REM).
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
3.3K
01:13Functional Brain Systems: Reticular Formation
6.0K
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...
6.0K