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相关概念视频

Olfaction01:25

Olfaction

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...
Physiology of Smell and Olfactory Pathway01:20

Physiology of Smell and Olfactory Pathway

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...
Olfactory Receptors: Location and Structure01:03

Olfactory Receptors: Location and Structure

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...

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相关实验视频

Updated: Jun 2, 2026

Multi-unit Recording Methods to Characterize Neural Activity in the Locust (Schistocerca Americana) Olfactory Circuits
12:13

Multi-unit Recording Methods to Characterize Neural Activity in the Locust (Schistocerca Americana) Olfactory Circuits

Published on: January 25, 2013

通过广场内部神经元对气味进行稀疏编码的规范化.

Maria Papadopoulou1, Stijn Cassenaer, Thomas Nowotny

  • 1Division of Biology, Computation and Neural Systems Program, California Institute of Technology, Pasadena, CA 91125, USA.

Science (New York, N.Y.)
|May 10, 2011
PubMed
概括

研究人员在体中发现了一个负反循环,这种循环在体中产生稀疏的气味表现. 这种神经电路确保可靠的传感信息处理用于记忆和存储.

科学领域:

  • 神经科学是一个神经科学.
  • 昆虫的嗅觉 昆虫的嗅觉
  • 计算神经科学是一种神经科学.

背景情况:

  • 稀疏编码对于有效的感官表现和记忆至关重要.
  • 在昆虫中,嗅觉信息从状叶子中的密度转变为体中的稀疏.
  • 虫的这种转变涉及振荡输出,抑制电路和特定的神经元特性.

研究的目的:

  • 为了研究在虫体中维持稀疏气味表现的神经机制.
  • 识别负反循环中负责稀疏编码的组件.

主要方法:

  • 在虫中的电生理记录.
  • 体的电路分析.
  • 研究一种特定的抑制性内部神经元的作用.

主要成果:

  • 在体内存在一个正常化的负反循环.
  • 这一循环涉及到一个独特的"巨型"非刺刺抑制性内部神经元.
  • 内部神经元表现出无处不在的连接和分级释放,这对于保持稀疏输出至关重要.

结论:

  • 识别出的负反循环对于昆虫嗅觉系统中稀疏编码至关重要.

更多相关视频

New Methods to Study Gustatory Coding
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New Methods to Study Gustatory Coding

Published on: June 29, 2017

Perforated Patch-clamp Recording of Mouse Olfactory Sensory Neurons in Intact Neuroepithelium: Functional Analysis of Neurons Expressing an Identified Odorant Receptor
10:16

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

Published on: July 13, 2015

相关实验视频

Last Updated: Jun 2, 2026

Multi-unit Recording Methods to Characterize Neural Activity in the Locust (Schistocerca Americana) Olfactory Circuits
12:13

Multi-unit Recording Methods to Characterize Neural Activity in the Locust (Schistocerca Americana) Olfactory Circuits

Published on: January 25, 2013

New Methods to Study Gustatory Coding
10:59

New Methods to Study Gustatory Coding

Published on: June 29, 2017

Perforated Patch-clamp Recording of Mouse Olfactory Sensory Neurons in Intact Neuroepithelium: Functional Analysis of Neurons Expressing an Identified Odorant Receptor
10:16

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

Published on: July 13, 2015

  • 这种机制确保了在不同的输入条件下强大的气味表示.
  • "巨型"抑制性内部神经元在调节神经稀疏度方面发挥着关键作用.