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相关概念视频

Olfaction01:25

Olfaction

44.2K
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...
44.2K
Physiology of Smell and Olfactory Pathway01:20

Physiology of Smell and Olfactory Pathway

8.0K
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...
8.0K
Olfactory Receptors: Location and Structure01:03

Olfactory Receptors: Location and Structure

8.7K
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...
8.7K

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相关实验视频

Updated: Jun 6, 2025

A Free-breathing fMRI Method to Study Human Olfactory Function
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嗅觉训练会影响大脑结构和功能连接之间的相关性.

Abolhasan Rezaeyan1, Somayeh Asadi2, Seyed Kamran Kamrava3

  • 1Department of Radiology, School of Paramedical Sciences, Gerash University of Medical Sciences, Gerash, Iran.

The neuroradiology journal
|December 3, 2024
PubMed
概括

在创伤后解脱症 (PTA) 患者的嗅觉训练 (OT) 增强了大脑功能连接 (FC) 和嗅觉区域的结构变化. 经典和修改的OT方法都显示出改善,与解剖学大脑变化相关.

关键词:
功能连接性的功能连接性.这就是为什么MRI是MRI.大脑结构 大脑结构嗅觉训练是通过嗅觉训练进行的.创伤后解热症是一种创伤后解热症.

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相关实验视频

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Training Dogs for Awake, Unrestrained Functional Magnetic Resonance Imaging
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科学领域:

  • 神经成像是一种神经成像.
  • 神经科学是一个神经科学.
  • 嗅觉研究 嗅觉研究

背景情况:

  • 神经成像研究揭示了创伤后解脱症 (PTA) 的功能连接 (FC) 变化和结构异常.
  • 嗅觉训练 (OT) 和气味暴露可以改善嗅觉功能.
  • 这项研究调查了PTA患者在OT后嗅觉大脑区域中FC和皮质厚度之间的联系.

研究的目的:

  • 探索功能连接 (FC) 和皮质厚度之间的相关性,在与嗅觉相关的大脑区域,在经创伤后厌氧症 (PTA) 患者的嗅觉训练 (OT).

主要方法:

  • 25名PTA患者被分为三个组:对照组 (没有训练),经典OT (4个固定气味),修改OT (4组4个连续气味).
  • 嗅觉功能被评估使用Sniffin' Sticks测试在训练前和训练后.
  • 磁共振成像 (MRI) 数据被分析为功能连接和大脑形态学.

主要成果:

  • 修改后的OT增加了中间轨道前皮层和前环皮层的激活,在皮质皮层 (PIRC) 和尾状核之间增强了FC.
  • 经典的OT增加了PIRC和前中心回形之间的岛皮层激活和FC.
  • 两个OT组都显示了与解剖学变化相关的大脑连接的显著改善.

结论:

  • 密集的嗅觉训练可以增强大脑嗅觉处理区域的功能连接.
  • 这些功能连接的改善与大脑中可测量的结构变化相关.