Does sleep promote adaptation to acute stress: An experimental study
Emil Hein1, Risto Halonen1,2, Thomas Wolbers3,4
1SleepWell Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland.
Neurobiology of Stress
|February 19, 2024
Summary
Acute social stress increased slow-wave sleep (SWS) and altered brain activity during subsequent sleep, suggesting sleep aids stress adaptation. This study explored stress effects on sleep dynamics using polysomnography (PSG).
Area of Science:
- Neuroscience
- Sleep Medicine
- Psychophysiology
Background:
- Chronic stress impacts sleep, but experimental data on acute stress effects are limited and inconsistent.
- Understanding acute stress's influence on sleep is crucial for mental health and well-being.
Purpose of the Study:
- To experimentally investigate the effects of acute pre-sleep social stress on subsequent sleep dynamics.
- To analyze sleep parameters and brain activity using polysomnography (PSG) after a stress-inducing virtual reality (VR) task.
Main Methods:
- Thirty-four healthy adults underwent a stress condition (SC) or control condition (CC) in VR.
- Overnight EEG, heart rate variability (HRV), electrodermal activity (EDA), and salivary cortisol were measured to assess sleep and physiological arousal.
Main Results:
- Acute stress (SC) led to increased slow-wave sleep (SWS) and decreased N2 sleep in the first cycle compared to CC.
- Elevated power spectral density (PSD) in beta frequency ranges (16-24 Hz and 25-35 Hz) was observed during N2 and SWS stages throughout the night in the SC group.
Conclusions:
- Sleep, particularly SWS, appears to promote adaptation to acute social stress, a finding previously unconfirmed in human experimental studies.
- The role of elevated high-frequency PSD during N2 and SWS in resolving transient stress requires further investigation.
Related Concept Videos
01:24Physiological Foundation of Stress
58
Stress triggers a coordinated physiological response involving the sympathetic nervous system (SNS) and the hypothalamic-pituitary-adrenal (HPA) axis. This dual activation ensures that the body is prepared for both immediate and prolonged stress management. The process begins with the perception of a stressor. This initial phase activates the SNS, leading to the rapid release of adrenaline (epinephrine) from the adrenal glands.
Role of the Sympathetic Nervous System
Adrenaline triggers the...
Role of the Sympathetic Nervous System
Adrenaline triggers the...
58
01:13Insufficient Sleep and Sleep Deprivation
143
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...
143
01:27Introduction to Stress and Lifestyle
111
Stress is a multifaceted response to events perceived as challenging or threatening, highlighting physical, emotional, cognitive, and behavioral reactions. Physically, stress can lead to fatigue, sleep disruptions, and various health issues such as frequent colds, chest pains, and nausea. Emotionally, it can manifest as anxiety, depression, irritability, and anger triggered by both minor and major life events. Cognitively, it may result in difficulty in concentration, memory, and...
111
01:21Stress Response System
91
The stress response system, also known as the fight-or-flight response, is the body's automatic physiological reaction to perceived threats. Hans Selye introduced the concept of General Adaptation Syndrome (GAS) to describe the predictable pattern of changes that occur in response to stress. GAS consists of three sequential stages: alarm, resistance, and exhaustion. This model helps explain how chronic stress can contribute to health problems.
Alarm stage
In the alarm stage, the body's...
Alarm stage
In the alarm stage, the body's...
91
01:11Understanding Sleep
228
Sleep, an essential biological state, involves significant reductions in physical activity, sensory awareness, and interaction with the environment. This complex physiological process is primarily regulated by specific brain regions, notably the hypothalamus and pons, which govern the sleep-wake cycle or circadian rhythm.
The circadian rhythm, a nearly 24-hour cycle, is deeply influenced by environmental light cues. Light exposure directly affects the hypothalamus, which in turn regulates...
The circadian rhythm, a nearly 24-hour cycle, is deeply influenced by environmental light cues. Light exposure directly affects the hypothalamus, which in turn regulates...
228
01:20Psychological Responses to Stress
54
Psychological responses to stress encompass the various cognitive and emotional reactions individuals experience when faced with challenging or threatening situations, such as a job loss. Prolonged exposure to stressors can disturb emotional balance, increasing negative emotions (e.g., anxiety and sadness) and diminishing positive emotions (e.g., joy and satisfaction). These persistent emotional shifts are associated with an increased risk of both physical illness and mental health issues, such...
54