德尔塔和阿尔法功率的正面和时间-双侧变化伴随着压力诱导的血管收缩和血压反应
Joe Braun1, Mariya Patel1, Will Woods2
1School of Health Sciences, Swinburne University of Technology, Melbourne, Australia.
Journal of neurophysiology
|May 14, 2025
概括
心理压力会影响大脑活动和血压. 在insula和杏仁体等区域减少的α大脑波与更高的血压和交感神经活动相关.
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
- 心理生理学 心理生理学
背景情况:
- 对急性精神压力的过度心血管反应与高血压和血管功能障碍有关.
- 了解这些反应的神经生理基础对于风险分层至关重要.
研究的目的:
- 研究在急性心理压力期间电生理学大脑活动和心血管/交感反应之间的关系.
- 识别与压力引起的血压和神经活动变化相关的特定大脑区域和频段.
主要方法:
- 在29名健康参与者中,同时记录磁脑电图 (MEG),肌肉交感神经活动 (MSNA) 和血压.
- 在三角波,三角波,α,β和马频段中分析大脑功率.
- 对大脑功率,缩血压 (SBP) 和MSNA之间的相关性分析.
主要成果:
- 压力增加了缩血压 (SBP),心率和MSNA.
- 观察到三角电力 (额叶皮层,前 cingulate,杏仁体) 的显著增加和阿尔法电力 (precuneus,后 cingulate,海马体,insula) 的减少.
- 胰岛和杏仁体的阿尔法功率降低与SBP和心理痛苦得分相关.
- 降低阿尔法功率在具有高度同情和SBP反应能力的个体中更加明显.
结论:
- 区域化和频率特定的大脑功率变化与压力期间血压的神经调节有关.
- 胰岛和杏仁体的阿尔法功率减少可能作为增加压力反应和心血管风险的生物标志物.
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