在大脑中追踪人类同情心血管控制机制
Vaughan G Macefield1, Luke A Henderson2
1Department of Neuroscience, Monash University, Melbourne, Australia. vaughan.macefield@monash.edu.
这项研究使用了与肌肉交感神经活动 (MSNA) 合的功能性MRI (fMRI) 来映射大脑对血压的控制. 研究结果显示,皮质区域,包括前额叶皮质,是通过脑干途径调节血压的关键.
科学领域:
- 神经科学是一个神经科学.
- 心血管生理学心血管生理学
- 医疗成像医学成像
背景情况:
- 血压调节是复杂的,涉及脑干和上层皮质中心.
- 了解控制交感外流的神经通路对于管理高血压至关重要.
- 以前的研究集中在脑干机制上,对皮质干涉的了解较少.
研究的目的:
- 用一种新的方法研究血压的神经控制,该方法将功能磁共振成像 (fMRI) 与肌肉交感神经活动 (MSNA) 记录相结合.
- 识别特定的大脑区域及其与产生同情性外流有关的功能连接.
- 阐明脑干上方区域在血压调节中的作用.
主要方法:
- 同时记录MSNA通过微电极在常神经和大脑的fMRI.
- 使用功能连接分析绘制与MSNA相关的大脑网络的地图.
- 识别参与产生同情性外流到肌肉血管床的大脑区域.
主要成果:
- 证实了核通道单独体 (NTS),尾部腹侧髓 (CVLM) 和面部腹侧髓 (RVLM) 在MSNA. baroreflex控制中的既定作用.
- 鉴定出皮层区域 (背侧前额叶皮层,前皮层,内皮层) 与RVLM之间的显著功能合.
- 证明这些皮层区域通过下丘脑和中脑连接到RVLM.
结论:
- 人类交感神经系统对血压的控制涉及到一个超越脑干的网络,包括皮质区域.
- 背侧前额皮质,前皮和胰岛膜通过涉及下丘脑和PAG的途径在血压调节中发挥着重要作用.
- 这项研究强调了上结构在心血管功能的整体控制中的重要性.
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