相关实验视频
Updated: May 15, 2025

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A Free-breathing fMRI Method to Study Human Olfactory Function
Published on: July 30, 2017
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使用事件相关的fMRI和图形理论来识别人类的嗅觉和化学信号神经网络
Saideh Ferdowsi1, Tom Foulsham2, Alireza Rahmani3
1School of Mathematics, Statistics and Actuarial Science, University of Essex, Colchester, UK. s.ferdowsi@essex.ac.uk.
Scientific reports
|April 8, 2025
概括
人体气味与非社会气味相比,激活了不同的大脑网络,涉及到像后部中枢轨道前皮层 (pmOFC) 这样的社会处理区域. 这突显了嗅觉在社会行为中的作用.
科学领域:
- 神经科学是一个神经科学.
- 嗅觉加工 嗅觉加工
- 社会的认知社会认知.
背景情况:
- 嗅觉刺激在人类社会互动中起着至关重要的作用.
- 了解嗅觉感知的神经基础对于破译社会行为至关重要.
- 以前的研究还没有完全阐明不同类型的气味所涉及的独特神经网络.
研究的目的:
- 描述和比较与空气,非社会气味和人体气味相关的功能神经网络.
- 调查社会气味引发不同神经网络的假设,特别是在社会处理区域.
- 通过网络分析,确定参与处理不同嗅觉刺激的关键大脑区域.
主要方法:
- 使用与事件相关的功能磁共振成像 (fMRI) 来测量神经活动.
- 利用了一种新的处理管道,集成图形理论用于功能网络识别.
- 执行统计验证,模块化评估和稳定性测量以确保网络稳定性.
主要成果:
- 与非社会气味和空气网络相比,人体气味网络在后部中位轨道前皮层 (pmOFC) 和状面部区域 (FFA) 中的中心性更强.
- 前胰岛 (INSa),后皮质皮质 (PPC) 和杏仁体 (AMY) 显示出对空气和气味网络的影响很大,从而提高了全球网络的效率.
- 这些发现支持在体臭网络中整合社会和嗅觉信息.
结论:
- 不同的嗅觉刺激,包括空气,非社会气味和社会身体气味,招募不同的神经回路.
- pmOFC和FFA是处理社会嗅觉信息,整合社会和嗅觉线索的关键枢纽.
- 嗅觉通过专门的神经网络招募,对人类的社会行为做出了重大贡献.
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