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相关概念视频

Olfaction01:25

Olfaction

44.4K
The sense of smell is achieved through the activities of the olfactory system. It starts when an airborne odorant enters the nasal cavity and reaches olfactory epithelium (OE). The OE is protected by a thin layer of mucus, which also serves the purpose of dissolving more complex compounds into simpler chemical odorants. The size of the OE and the density of sensory neurons varies among species; in humans, the OE is only about 9-10 cm2.
The olfactory receptors are embedded in the cilia of the...
44.4K
Physiology of Smell and Olfactory Pathway01:20

Physiology of Smell and Olfactory Pathway

8.6K
Humans detect odors with the help of specialized cells located in the upper part of the nasal cavity, called olfactory receptor neurons (ORNs). ORNs possess hair-like structures called cilia, which are receptive to sensations from the inhaled air. When an odorant molecule binds to a specific receptor on the cell of the cilia, it leads to a series of events that ultimately cause the ORN to send electrical signals to the olfactory bulb in the brain through the olfactory nerves.
The olfactory...
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Olfactory Receptors: Location and Structure01:03

Olfactory Receptors: Location and Structure

9.3K
The process of olfaction, also known as the sense of smell, is a sophisticated chemical response system. The specialized sensory neurons that facilitate this process, known as olfactory receptor neurons, are situated in an upper segment of the nasal cavity, known as the olfactory epithelium. Olfactory sensory neurons are bipolar, with their dendrites extending from the epithelium's apex into the mucus that lines the nasal cavity. Airborne molecules, when inhaled, traverse the olfactory...
9.3K
G-Protein Gated Ion Channels01:21

G-Protein Gated Ion Channels

4.6K
GPCRs are primarily responsible for our sense of smell, taste, and vision.  The binding of a sensory stimulus activates GPCR to stimulate effector proteins, many of which are ion channels in the sensory organs. GPCRs modulate the opening and closing of the target ion channels either directly by binding them, or by releasing second messengers that activate these channels. As ions move across the membrane, the membrane potential is altered, which induces an appropriate response.
Sensory...
4.6K
The Physiology of Taste01:24

The Physiology of Taste

3.9K
The perception of a salty flavor is facilitated by sodium ions within the oral salivary fluid. Upon consumption of a salty substance, salt crystals disassemble, leading to the liberation of its constituents—Na+ and Cl- ions. These ions subsequently dissolve into the salivary fluid present in the oral cavity. The external environment of the gustatory cells experiences an elevation in Na+ concentration, thereby establishing a potent concentration gradient. This gradient propels the...
3.9K
Introduction to Special Senses01:26

Introduction to Special Senses

5.8K
Sensory receptors play an integral part in comprehending our external and internal environments. They receive diverse stimuli, converting them into the nervous system's electrochemical signals. This conversion occurs as the stimulus alters the sensory neuron's cell membrane potential, instigating the generation of an action potential. This action potential is subsequently transmitted to the central nervous system (CNS), which integrates with other sensory data or higher cognitive...
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相关实验视频

Updated: Jul 11, 2025

Constructing an Olfactometer for Rodent Olfactory Behavior Studies Near-Infrared Spectroscopy Hyperscanning Study in Psychological Counseling
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Constructing an Olfactometer for Rodent Olfactory Behavior Studies Near-Infrared Spectroscopy Hyperscanning Study in Psychological Counseling

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嗅觉处理中的专业增益控制机制之间的相互作用

Asa Barth-Maron1, Isabel D'Alessandro1, Rachel I Wilson1

  • 1Department of Neurobiology, Harvard Medical School, 220 Longwood Avenue, Boston, MA 02115, USA.

Current biology : CB
|November 15, 2023
PubMed
概括
此摘要是机器生成的。

神经系统使用各种增益控制机制来调整灵敏度. 这项研究揭示了Drosophila天线叶中的专门抑制性内神经元如何相互作用,以改善刺激歧视和网络强度.

关键词:
适应 适应 适应 适应连接经济学是连接经济学.动力学 动力学 动力学过过器可以过.抑制抑制抑制的抑制作用当地神经元 局部神经元嗅觉 嗅觉是一种嗅觉.短期的突触性抑郁症 短期的突触性抑郁症

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Real-time In Vitro Monitoring of Odorant Receptor Activation by an Odorant in the Vapor Phase
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Real-time In Vitro Monitoring of Odorant Receptor Activation by an Odorant in the Vapor Phase

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Perforated Patch-clamp Recording of Mouse Olfactory Sensory Neurons in Intact Neuroepithelium: Functional Analysis of Neurons Expressing an Identified Odorant Receptor
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Perforated Patch-clamp Recording of Mouse Olfactory Sensory Neurons in Intact Neuroepithelium: Functional Analysis of Neurons Expressing an Identified Odorant Receptor

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相关实验视频

Last Updated: Jul 11, 2025

Constructing an Olfactometer for Rodent Olfactory Behavior Studies Near-Infrared Spectroscopy Hyperscanning Study in Psychological Counseling
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Constructing an Olfactometer for Rodent Olfactory Behavior Studies Near-Infrared Spectroscopy Hyperscanning Study in Psychological Counseling

Published on: April 11, 2025

228
Real-time In Vitro Monitoring of Odorant Receptor Activation by an Odorant in the Vapor Phase
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Real-time In Vitro Monitoring of Odorant Receptor Activation by an Odorant in the Vapor Phase

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Perforated Patch-clamp Recording of Mouse Olfactory Sensory Neurons in Intact Neuroepithelium: Functional Analysis of Neurons Expressing an Identified Odorant Receptor
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Perforated Patch-clamp Recording of Mouse Olfactory Sensory Neurons in Intact Neuroepithelium: Functional Analysis of Neurons Expressing an Identified Odorant Receptor

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科学领域:

  • 神经科学是一个神经科学.
  • 计算神经科学是一种神经科学.
  • 昆虫神经生物学 昆虫神经生物学

背景情况:

  • 神经系统使用增益控制来调节对不断变化的输入水平的敏感性.
  • 神经系统中多个增益控制机制的必要性和相互作用仍然不太清楚.
  • 草的天线叶作为研究神经电路功能的模型系统.

研究的目的:

  • 研究Drosophila天线叶内的抑制性内部神经元在增益控制中的专门功能和相互作用.
  • 阐明多样化的增益控制机制如何促进强大的神经网络功能.
  • 了解体内和全球前突触增益控制之间的相互作用.

主要方法:

  • 在Drosophila天线叶中识别出不同的抑制性内部神经元类型.
  • 具有分隔信号的非尖端内部神经元的特征.
  • 利用计算建模和光遗传学扰动来分析神经电路动力学.
  • 通过网络输入对内部神经元的招募进行调查,以实现全球增益控制.

主要成果:

  • 发现了通过非尖端内部神经元进行专业化的内球增益控制.
  • 通过广泛的网络输入激活的介导全球前突触增益控制的内部神经元的识别.
  • 展示不同增益控制机制之间的协同作用.
  • 证据表明,组合机制增强了刺激歧视,减少了时间扭曲.

结论:

  • 多样化和专业化增益控制机制之间的相互作用提高了神经网络的稳定性.
  • 专门的抑制性内部神经元在本地和全球增益控制中发挥着关键作用.
  • 了解这些相互作用,可以了解神经回路中有效的感官处理.