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相关概念视频

Olfactory Receptors: Location and Structure01:03

Olfactory Receptors: Location and Structure

9.4K
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...
9.4K
Olfaction01:25

Olfaction

44.5K
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...
44.5K
Physiology of Smell and Olfactory Pathway01:20

Physiology of Smell and Olfactory Pathway

8.8K
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...
8.8K

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相关实验视频

Updated: Jul 23, 2025

Author Spotlight: Assessing the Olfactory Effects of Airborne Pollutants — Buried Food and Social Odor Tests
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Author Spotlight: Assessing the Olfactory Effects of Airborne Pollutants — Buried Food and Social Odor Tests

Published on: September 13, 2024

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儿童嗅觉功能障碍:一个范围审查

Jennifer Eva Payandeh1, Mehras Motamed1, Keshinisuthan Kirubalingam1

  • 1Faculty of Medicine, Queen's University, Kingston, Ontario, Canada.

Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery
|July 14, 2023
PubMed
概括

儿科嗅觉功能障碍源于45个已确定的原因,包括先天性和获得性. 临床医生需要诊断方法,安全教育至关重要,当原因仍然未知.

关键词:
病因 病因学 病因学嗅觉功能障碍 嗅觉功能障碍儿科 儿科 儿科 儿科气味测试 嗅觉测试 嗅觉测试 嗅觉测试

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Last Updated: Jul 23, 2025

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A Free-breathing fMRI Method to Study Human Olfactory Function
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科学领域:

  • 耳鼻喉科 耳鼻喉科 耳鼻喉科
  • 儿科医学 儿科医学
  • 神经科学是一个神经科学.

背景情况:

  • 嗅觉障碍在成年人中得到了广泛的研究,但对儿科嗅觉功能障碍的研究有限.
  • 了解儿童嗅觉丧失的原因和管理对于他们的发展和安全至关重要.

研究的目的:

  • 确定儿科患者嗅觉丧失的已知原因.
  • 评估儿童嗅觉测试的利用性和有效性.
  • 总结当前治疗儿科嗅觉功能障碍的治疗策略.

主要方法:

  • 2020年9月对PubMed,Ovid MEDLINE和Web of Science数据库进行了系统范围审查.
  • 两个独立的审稿人根据预定义的包含/排除标准对标题,摘要和全文进行了选.
  • 提取的数据包括研究特征,参与者人口统计,嗅觉功能障碍证据,嗅觉测试细节,病因和治疗方法.

主要成果:

  • 最终分析包括了103篇涉及1654名参与者的文章.
  • 宾夕法尼亚大学的气味识别测试是最常见的气味评估工具 (占研究的21%).
  • 总共有45种原因被确定:22种先天性和23种获得性嗅觉功能障碍.

结论:

  • 儿科嗅觉功能障碍具有不同的病因,需要临床医生的结构化诊断方法.
  • 只有很少的特定疗法被确定,通常是根据潜在原因量身定制的.
  • 当病因不明确时,患者和护理人员对与嗅觉丧失相关的安全性教育至关重要.