在MRI相关的焦虑期间的大脑呼吸相互作用
Gert Pfurtscheller1, Beate Rassler2, Maciej Kaminski3
1Institute of Neural Engineering, Graz University of Technology, Graz, Austria.
概括
鼻腔呼吸引发大脑振荡,影响神经活动和身体节奏. 0.32 Hz (20次/分钟) 的呼吸频率被确定为脑成像期间焦虑的普遍标志物.
科学领域:
- 神经科学是一个神经科学.
- 心理生理学 心理生理学
- 计算神经科学是一种神经科学.
背景情况:
- 鼻腔呼吸会影响前额叶皮层和边缘系统的神经振荡.
- 功能磁共振成像 (fMRI) 允许对杏仁体和海马体活动进行非侵入性研究.
- 以前的研究将神经振荡与心脏和呼吸系统节奏联系起来.
研究的目的:
- 通过同时进行生理学和fMRI记录,研究大脑结构与身体器官之间的定向合.
- 测试Klimesch的二进制层次模型,预测首选的呼吸频率和低频振荡 (ISO).
- 在神经成像过程中识别与焦虑相关的呼吸模式.
主要方法:
- 在fMRI期间同时记录BOLD信号,呼吸和心脏RR间隔 (RRI) 时间课程.
- 应用多变量自回归 (MVAR) 模型和格兰杰因果关系分析来评估信息流.
- 在马,贝塔和低频 (<0.1 Hz) 范围内的神经振荡分析.
主要成果:
- 鼻腔呼吸导致前额叶皮层和边缘系统的快速振荡.
- 该研究确定了0.32 Hz,0.16 Hz和0.08 Hz的首选呼吸频率,以及0.02 Hz的ISO.
- 发现0.32 Hz (∼20次/分钟) 的呼吸频率是患者和健康参与者的普遍焦虑标志.
结论:
- 同时的生理和fMRI记录与MVAR建模可以揭示大脑-身体信息流.
- 克利梅什的模型准确地预测了与神经和生理节奏相关的首选呼吸频率.
- 0.32 Hz的呼吸频率是焦虑的显著心理生理学标志物,可以在fMRI中观察到.
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