相关实验视频
Updated: Jul 12, 2025

09:28
A Method of Nodose Ganglia Injection in Sprague-Dawley Rat
Published on: November 25, 2014
18.9K
虚感神经元调解贝佐尔德-贾里斯反射并诱导昏睡
Jonathan W Lovelace1,2, Jingrui Ma1,2, Saurabh Yadav1,2
1Department of Neurobiology, University of California, San Diego, CA, USA.
Nature
|November 2, 2023
概括
研究人员确定了神经Y受体Y2 (NPY2R) 阴道感官神经元 (VSN),这些神经元触发了贝佐尔德-贾里斯克反射 (BJR),导致昏迷. 切除这些NPY2RVSN消除了BJR,揭示了这种神经事件的关键途径.
科学领域:
- 神经科学
- 心脏病学
- 生理学
背景情况:
- 感官通路对平衡反应至关重要, 它们的功能障碍与神经系统疾病有关.
- 怀疑Bezold-Jarisch反射 (BJR) 是一种心脏抑制反射,涉及阴道感官神经元 (VSN) 并可能导致昏迷.
- 心脏VSN的确切身份和功能在很大程度上是未知的.
研究的目的:
- 确定参与BJR的心脏VSN的分子特征,解剖联系,生理特征和行为影响.
- 为了阐明由BJR引发的神经回路.
主要方法:
- 单细胞RNA测序和HYBRiD组织清除以识别VSN.
- 激活和抑制特定VSN群体的光遗传学.
- 高分辨率心声学,激光多普勒流量计和行为观察以评估生理和行为反应.
- 大规模的神经像素记录和机器学习用于神经网络分析.
- 对NPY2RVSN进行特异性切除.
主要成果:
- 确定了表达神经Y受体Y2 (NPY2R) 的VSN,主要连接心脏心室壁与后膜区域.
- 对NPY2RVSN的光遗传激活诱导了BJR三重体 (低血压,心,呼吸抑制) 和昏迷.
- 详细的生理和行为表型反映了临床,包括心脏输出减少和大脑低 perfusion.
- 神经网络分析显示神经元活动受到广泛抑制.
- 对周围区域的操纵显示了对昏迷持续时间和兴奋的推拉效应.
- 取消NPY2RVSN完全取消了BJR.
结论:
- NPY2R VSN 形成了一个由基因定义的心脏反射通路,负责BJR.
- 这条路径准确地回顾了人类昏迷的关键生理,行为和神经网络特征.
- 这些发现为理解和潜在治疗提供了特定的神经基质.
相关概念视频
Somatic Spinal Reflexes
2.1K
Somatic spinal reflexes are rapid, involuntary muscular responses to external stimuli that involve the somatic musculature and the spinal cord.
One of the most well-known somatic spinal reflexes is the stretch reflex, which is activated by the sudden stretching of a muscle. This reflex involves the activation of specialized sensory receptors called muscle spindles, which are located in the muscle tissue and detect changes in the length and speed of muscle contractions. When a muscle is suddenly...
One of the most well-known somatic spinal reflexes is the stretch reflex, which is activated by the sudden stretching of a muscle. This reflex involves the activation of specialized sensory receptors called muscle spindles, which are located in the muscle tissue and detect changes in the length and speed of muscle contractions. When a muscle is suddenly...
2.1K
Pathophysiology of Vomiting
501
Vomiting is a complex physiological response to expel harmful or irritating substances from the body. It's a defensive mechanism triggered by stimuli like poisons, microbial toxins, cytotoxic drugs, and mechanical abdominal distension. The process is centrally coordinated by the vomiting (or emetic) center located in the medulla of the brainstem. This area, rich in muscarinic M1, histamine H1, neurokinin 1 (NK1), and serotonin 5-HT3 receptors, coordinates the act of vomiting through...
501
Major Somatic Sensory Pathways
986
Sensory impulses related to touch, pressure, vibration, and proprioception from various body parts, such as the limbs, trunk, neck, and posterior head, travel to the cerebral cortex through the posterior column-medial lemniscus pathway. The pathway’s name derives from the two white-matter tracts that convey the impulses: the spinal cord's posterior column and the brainstem's medial lemniscus. First-order sensory neurons extend their axons into the spinal cord, forming the...
986
Brainstem: Control Centers of Medulla
1.7K
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...
1.7K
Neural Regulation of Blood Pressure
2.9K
The neural regulation of blood pressure involves intricate interactions between the autonomic nervous system (ANS) and cardiovascular system, ensuring adequate perfusion of tissues. This regulation primarily occurs through baroreceptor and chemoreceptor reflexes, involving both short-term and long-term mechanisms.
Baroreceptor Reflex
Baroreceptors, located in the carotid sinuses and aortic arch, detect changes in blood pressure. When blood pressure rises, these stretch-sensitive receptors...
Baroreceptor Reflex
Baroreceptors, located in the carotid sinuses and aortic arch, detect changes in blood pressure. When blood pressure rises, these stretch-sensitive receptors...
2.9K
Overview of Synapses
2.4K
A synapse is a specialized structure where two neurons connect, allowing them to pass an electrical or chemical signal to another neuron. It is the point of communication between neurons. The term "synapse" is derived from the Greek word "synapsis," which means "conjunction." The entire process of neural communication revolves around the synapse. When activated, a neuron releases chemicals known as neurotransmitters into the synapse. These neurotransmitters cross the synapse and bind to...
2.4K

