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Updated: Jun 15, 2025

A Free-breathing fMRI Method to Study Human Olfactory Function

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帕金森病,轻度认知障碍和认知正常个体的嗅觉网络的功能连接性差异:休息状态fMRI研究

F Cieri¹, P P Giriprakash¹, R Nandy²

¹Department of Neurology, Cleveland Clinic Lou Ruvo Center for Brain Health, Las Vegas, NV 89106, USA.

|August 23, 2024

概括

嗅觉功能障碍是神经退行性疾病的早期指标,如帕金森病和阿尔茨海默病. 嗅觉区域的大脑连接模式可以帮助区分正常认知和受损,尾状核是关键结构.

科学领域:

神经科学是一个神经科学.
神经成像是一种神经成像.
感官系统感官系统

背景情况:

嗅觉功能障碍是神经退行性疾病的早期症状,如帕金森病 (PD) 和阿尔茨海默病 (AD),以及轻度认知障碍 (MCI).
了解嗅觉大脑区域的功能连接对于阐明这些疾病的病理生理学至关重要.

研究的目的:

调查认知正常 (CN),MCI和PD患者的嗅觉结构之间的神经时间关系 (功能连接) 认知障碍患者 (PD-CogImp).
确定机器学习是否可以根据连接模式对异常的嗅觉相关大脑功能进行分类.

主要方法:

基于区域的分析使用静止状态功能磁共振成像 (rs-fMRI).
机器学习算法的应用 (线性和集体学习) 用于分类.
客观的嗅觉测试与诊断状态相关联.

主要成果:

嗅觉测试显示,与诊断状态的关联最强.
与CN个体相比,PD-CogImp患者的功能连接性始终较低.
在PD-CogImp和MCI之间,以及在特定大脑区域的MCI和CN组之间,观察到明显的连接性差异.
一个逻辑回归模型确定尾状核是最具歧视性的嗅觉相关结构 (精度=0.88,AUC=0.90).

结论:

嗅觉雄辩结构之间的休息功能连接具有了解神经退行性疾病病理生理学的潜力.
尾状核在嗅觉相关的神经退行过程中起着重要作用.
功能连接模式可以帮助区分与嗅觉功能障碍相关的正常和受损的认知状态.

关键词:

功能连接的功能连接性嗅觉是一种嗅觉.帕金森氏症帕金森氏症性差异性差异性差异性差异性差异性差异性差异性功能磁力共振成像 (fMRI) 是一种功能共振成像.

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