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在严重暴露于热量的情况下,大脑温度升高会损害皮质运动活动和执行功能
Xiang Ren Tan1, Mary C Stephenson2, Sharifah Badriyah Alhadad3
1Health and Social Sciences, Singapore Institute of Technology, Singapore 138683, Singapore; Human Potential Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore.
Journal of sport and health science
|September 7, 2023
概括
严重的热暴露会增加大脑温度,损害运动皮层活动和执行功能. 像摄入冰这样的冷却策略可以减轻对认知和身体表现的这些负面影响.
科学领域:
- 神经科学是一个神经科学.
- 环境生理学环境生理学
- 人类表现的人类表现.
背景情况:
- 暴露于热量是一个生理压力因素,可以损害身体和认知功能.
- 严重的热应激对大脑生理和功能的确切影响仍然不清楚.
研究的目的:
- 为了研究严重的热应激如何影响大脑温度,大脑输液和神经活动.
- 评估高温症对运动和执行功能的影响.
- 评估内部冷却策略对与热有关的神经干扰的有效性.
主要方法:
- 11名健康参与者通过运动或浸泡在热水中进行热应激,以诱导高温 (直肠温度为39.5°C).
- 使用MRI测量大脑温度,大脑输液和大脑活动.
- 在运动期间测试了一种涉及混合冰摄入的冷却策略.
主要成果:
- 大脑温度在休息时受到严格调节,但在高温时增加,反映直肠温度.
- 热量过高抑制了运动皮质活动,减少了灰色质 perfusion,影响执行功能.
- 摄入冰水有效降低了直肠和大脑的温度,并减少了神经干扰.
结论:
- 严重的热暴露会提高大脑温度,扰乱运动皮质活动,并损害执行功能.
- 这些神经变化有助于在热应激下降低身体和认知表现.
- 内部冷却策略在缓解热引起的神经损伤方面表现有前途.
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