相关实验视频
Updated: Jun 26, 2025
10:42
A Free-breathing fMRI Method to Study Human Olfactory Function
Published on: July 30, 2017
9.6K
基于fMRI的研究,对气味对工作记忆的基础功能连接网络的影响进行了研究
Faezeh Heidari1, Mohammad Bagher Shiran2,3, Haniyeh Kaheni2,3
1Clinical Neuroscience and Neuroimaging, Department of Neurology, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland.
Experimental brain research
|May 16, 2024
概括
愉快的气味,如香草,增强大脑连接工作记忆. 嗅觉刺激与记忆区域呈反向相关性,特别是在下面的头顶区域.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 感官系统 感官系统
背景情况:
- 嗅觉显著影响涉及情绪,动机和记忆的大脑区域.
- 嗅觉神经通路是独特的暴露在外部环境.
研究的目的:
- 调查嗅觉刺激如何影响工作记忆任务期间的功能性大脑连接.
- 探索嗅觉和工作记忆网络之间的关系.
主要方法:
- 功能磁共振成像 (fMRI) 用于研究30名成年人的大脑活动.
- 参与者接受了愉快的气味 (香草),不愉快的气味,空气和零刺激的嗅觉测试.
- 进行了基于种子和基于兴趣地区 (ROI) 的分析.
主要成果:
- 与零刺激相比,用香草气味进行的嗅觉刺激显示了下和左额头极区域之间的功能连接.
- 在内耳皮层,轨道前皮层和背侧前额皮层 (dlPFC) 中观察到逆同步.
- dlPFC和海马参与区分不同的气味,愉快的气味会影响工作记忆区域,如下巴区域.
结论:
- 嗅觉和工作记忆在特定的大脑区域呈现反向相关性.
- 愉快的嗅觉刺激,特别是香草,对工作记忆相关的神经回路有显著的影响.
- 这些发现突出了感官输入和认知功能之间的复杂相互作用.
相关概念视频
01:25Olfaction
44.3K
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...
The olfactory receptors are embedded in the cilia of the...
44.3K
01:20Physiology of Smell and Olfactory Pathway
8.4K
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...
The olfactory...
8.4K