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Olfaction01:25

Olfaction

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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...
48.0K
Physiology of Smell and Olfactory Pathway01:20

Physiology of Smell and Olfactory Pathway

12.1K
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...
12.1K
Olfactory Receptors: Location and Structure01:03

Olfactory Receptors: Location and Structure

11.1K
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...
11.1K

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相关实验视频

Updated: Jan 8, 2026

A Free-breathing fMRI Method to Study Human Olfactory Function
10:42

A Free-breathing fMRI Method to Study Human Olfactory Function

Published on: July 30, 2017

10.0K

气味命名的线索会影响性能和大脑连接.

Eda Nur Capkan1,2, Funda Yildirim1,2

  • 1Section of Cognition, Data and Education, University of Twente, Enschede, Netherlands.

Frontiers in human neuroscience
|December 18, 2025
PubMed
概括

像单词或颜色这样的视觉线索通过影响大脑网络来影响气味命名. 词汇线索直接访问语言区域,而颜色线索涉及更广泛的视觉和半球间连接,用于嗅觉感知.

科学领域:

  • 神经科学是一个神经科学.
  • 认知科学 认知科学
  • 感官感知是一种感官感知.

背景情况:

  • 人类的嗅觉感知涉及复杂的多感官集成.
  • 视觉线索可以帮助识别和命名气味,但它们的神经支柱尚未完全理解.
  • 调查不同的暗示类型如何调节气味命名的神经机制至关重要.

研究的目的:

  • 用行为和EEG方法检查气味识别的认知机制.
  • 调查词汇和颜色视觉线索对气味命名性能的影响.
  • 探索与提示辅助气味识别相关的神经连接模式.

主要方法:

  • 在40名参与者中使用了Sniffin' Sticks嗅觉测试.
  • 使用行为评估和脑电图 (EEG) 来分析神经活动.
  • 应用格兰杰因果分析来检查气味命名期间的功能网络连接.

主要成果:

  • 词汇线索显著提高了气味识别的准确性.
  • 气味熟悉度和喜欢度对准确度和响应时间都有影响.
  • 颜色线索引发了比词汇线索更广泛的网络连接 (额頭-頭),这些线索显示了集中的额头-頭/頭激活.
关键词:
颜色 暗示符号 颜色暗示符号电脑脑电图 (EEG) 是一种电脑电图.格兰杰因果关系分析词汇暗示词汇暗示词汇暗示多感应集成的多感应集成给气味起名的名称

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结论:

  • 交叉模式的气味命名根据暗示类型招募不同的神经通路.
  • 词汇线索促进了对语言网络的直接访问,而颜色线索则涉及到更广泛的视觉和半球间整合.
  • 了解这些特异性的神经机制,可以进一步了解嗅觉感知中的多感官集成.