冷水浸泡:同时评估大脑氧化,血管功能和温度调节反应
Cory M Smith1, Owen F Salmon1, Thomas Statz1
1Robbins College of Health and Human Sciences, Human & Environmental Physiology Laboratory, Baylor University, Waco, TX 76706, United States.
Military medicine
|November 17, 2025
概括
冷水浸泡 (CWI) 增加了大脑的氧化和潮体积,这表明一种由寒冷引起的反应. 这项研究使用功能近红外光谱学 (fNIRS) 来监测CWI期间的这些生理变化.
科学领域:
- 生理学 生理学 生理学
- 神经科学是一个神经科学.
- 环境医学 环境医学
背景情况:
- 了解冷水浸泡 (CWI) 对人类表现的影响对于开发监测技术和对策至关重要.
- 目前缺乏现场可部署的技术来实时监测冷感应的神经化学和代谢变化.
- 功能近红外光谱学 (fNIRS) 显示了监测神经生理对寒冷反应的潜力,但需要进一步研究.
研究的目的:
- 在CWI期间检查前额叶皮层 (PFC) 上的大脑血液动力学反应.
- 评估CWI期间的呼吸道和常见动脉 (CCA) 反应.
- 调查fNIRS在监测寒冷暴露期间生理变化的实用性.
主要方法:
- 26名参与者接受了10分钟的温中水浸泡 (TWI) 或CWI (15°C).
- 在PFC上通过fNIRS测量大脑氧化率 (O2Hb),呼吸率,潮体积和CCA直径.
- 皮肤温度和热感知也被记录下来.
主要成果:
- 与TWI相比,CWI显著增加了O2Hb (P < .01) 和CCA直径 (P < .01).
- 在CWI期间,潮量显著增加 (P < .01),而呼吸率保持不变.
- CWI导致皮肤温度下降和热感知增加.
结论:
- CWI诱导冷震反应,其特点是增加潮体积和大脑氧化.
- fNIRS数据表明,在CWI期间,大脑氧气供应和需求之间存在暂时的不匹配.
- 在CWI期间增加脑血流可能有助于防止局部温度下降,并增强代谢热生成.
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