相关实验视频
Updated: Jun 14, 2025

09:54
A Model to Simulate Clinically Relevant Hypoxia in Humans
Published on: December 22, 2016
8.8K
在睡眠限制后暴露于中度normobaric缺氧期间的认知表现:与生理和压力生物标志物的关系
Pierre Fabries1, Anaïs Pontiggia2, Ulysse Comte3
1Institut de Recherche Biomédicale des Armées (IRBA), 1 place Général Valérie André, 91223 Brétigny Cedex, France; École du Val-de-Grâce (EVDG), Place Alphonse Laveran, Paris, France; LBEPS, Université Paris-Saclay, 91025 Evry, France.
Physiology & behavior
|August 31, 2024
概括
睡眠限制与中度低氧相结合,显著损害了认知功能,如持续的注意力和执行能力. 这种在操作环境中常见的组合会影响反应时间和认知任务,突出潜在的风险.
科学领域:
- 环境生理学环境生理学
- 认知神经科学 认知神经科学
- 睡眠科学 睡眠科学
背景情况:
- 中度缺氧在健康人群中具有微妙的认知影响.
- 联合缺氧和睡眠限制的认知后果还没有得到充分研究.
- 这种组合适用于军事和民用作战环境.
研究的目的:
- 为了测试中度低氧与睡眠限制是否会影响认知.
- 评估生理参数和压力标志物 (皮质醇,α-氨基酶).
主要方法:
- 17名健康男性在两个条件下接受认知测试 (PVT,Go-NoGo,N-Back):睡眠限制+缺氧 (SRHY) 和习惯性睡眠+缺氧 (HSHY).
- 认知测试是在30分钟和4小时暴露于模拟的normobaric缺氧 (13.6%O2,~3,500m) 后进行的.
- 分析了生理学 (SpO2,HR) 和唾液 (皮质醇,α-氨基酶) 标记物.
主要成果:
- 认知性能 (持续的注意力,执行功能) 在SRHY条件下受损,而不是HSHY.
- 在这两种条件下,心率随着缺氧持续时间的增加而增加; SpO2仅在HSHY中增加.
- 在SRHY中唾液α-氨基酶较低,皮质醇较高;在SRHY中,α-氨基酶在4小时低氧后显著增加.
结论:
- 睡眠限制后的中度模拟性缺氧会在30分钟和4小时内损害认知表现.
- 由于缺氧和睡眠限制导致的认知障碍背后的机制,特别是执行功能,需要进一步阐明.
相关概念视频
Insufficient Sleep and Sleep Deprivation
137
Insufficient sleep refers to not getting the recommended amount of sleep for optimal functioning, even if it's just slightly less than needed. Sleep insufficiency may occur due to lifestyle choices, such as staying up late for social events or work, resulting in routinely getting less sleep than required. For example, consistently sleeping 6 hours when the body needs 7-9 hours can lead to cumulative effects on health and well-being.
Sleep deprivation is a more severe form of sleep loss...
Sleep deprivation is a more severe form of sleep loss...
137
Hypoxia
976
Hypoxia is a medical condition characterized by an inadequate oxygen supply to body tissues. It typically manifests as a bluish discoloration of the skin and mucosae, especially in fair-skinned individuals, when hemoglobin (Hb) saturation drops below 75%.
Types of Hypoxia
There are four primary types of hypoxia, each resulting from a different cause:
1. Anemic hypoxia: This type occurs due to insufficient oxygen delivery caused by a lack of red blood cells (RBCs) or RBCs with abnormal or...
Types of Hypoxia
There are four primary types of hypoxia, each resulting from a different cause:
1. Anemic hypoxia: This type occurs due to insufficient oxygen delivery caused by a lack of red blood cells (RBCs) or RBCs with abnormal or...
976
Hyperpnea and Hyperventilation
992
Hyperventilation refers to a higher-than-normal rate and depth of breathing, often associated with anxiety attacks. This excessive breathing surpasses the body's need to expel CO2, leading to a condition known as hypocapnia - an unusually low level of carbon dioxide in the blood. Hypocapnia can constrict cerebral blood vessels, reducing blood flow to the brain, which may result in dizziness or fainting. Early signs include tingling and muscle spasms in the hands and face, caused by falling...
992
Acute Respiratory Failure-IV
131
Respiratory failure can manifest suddenly or gradually, characterized by a rapid decline in PaO2 and a rapid rise in PaCO2. This situation indicates a severe respiratory problem that may quickly become a life-threatening emergency. One of the early signs of hypoxemic Acute Respiratory Failure (ARF) is a change in mental status due to the brain's sensitivity to oxygen levels and changes in acid-base balance. Symptoms such as restlessness, confusion, and agitation suggest inadequate oxygen...
131
Acute Respiratory Failure-II
186
Type I Respiratory Failure, or hypoxemic respiratory failure, occurs when the partial pressure of oxygen (PaO2) in arterial blood falls below 60 mmHg while breathing room air without a corresponding increase in arterial carbon dioxide levels (PaCO2). This condition highlights a significant impairment in the lungs' capacity to oxygenate the blood.
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:
186

