Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Sleep-Wake Cycles

Sleep-Wake Cycles

Sleep is an essential physiological process vital to maintaining overall well-being. The reticular activating system (RAS), a network of neurons in the brainstem, regulates wakefulness and sleep. While it may seem passive, sleep consists of distinct cycles, each with its unique characteristics and functions. Two key sleep phases are non-rapid eye movement (NREM) and rapid eye movement (REM).
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:

Stages of Sleep

Stages of Sleep

Sleep progresses through distinct stages, each characterized by specific brain wave patterns and physiological responses ranging from wakefulness to stages of non-rapid eye movement, known as non-REM, to rapid eye movement, referred to as REM. Understanding these stages helps in recognizing how sleep supports various bodily and cognitive functions.
Before sleep begins, in wakefulness, the brain exhibits primarily beta waves, which are high in frequency and low in amplitude, indicating alertness...

Understanding Sleep

Understanding Sleep

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...

Substance Use Disorders Affecting Sleep

Substance Use Disorders Affecting Sleep

Substance use disorders involve a pattern of using drugs more extensively than intended and continuing use despite harmful consequences. This includes legal substances like alcohol and nicotine, as well as illegal drugs. These disorders often involve both physical and psychological dependence, reflecting compulsive use of substances that significantly alter thoughts, feelings, and behaviors, contributing to a major public health issue.
Understanding the concepts of physical dependence,...

REM Sleep Behavior Disorder

REM Sleep Behavior Disorder

REM Sleep Behavior Disorder (RBD) is a sleep disorder characterized by the absence of muscle paralysis that normally occurs during the REM phase of sleep. This absence allows individuals to physically act out their dreams, which are often vivid and disturbing. Common behaviors exhibited during episodes include kicking, punching, and yelling. These actions can be dangerous, potentially leading to injuries for the person with RBD or their bed partner.
RBD is significantly associated with...

Management of Insomnia

Management of Insomnia

The sleep cycle, an integral part of human health, consists of several stages with distinct characteristics and functions. It begins with a transition from wakefulness to sleep, known as the light sleep phase, followed by the restorative deep sleep phase, essential for physical recovery and growth. The cycle concludes with the Rapid Eye Movement (REM) phase, characterized by high brain activity and vivid dreaming. Insomnia, a prevalent sleep disorder, involves difficulty falling asleep, staying...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Revisiting brain gene expression changes and protein modifications tracking homeostatic sleep pressure.

Npj biological timing and sleep·2025

Same author

Editorial: Long-term effects of adolescent stress, sleep deprivation, or circadian disruption on mood and anxiety.

Frontiers in neuroscience·2025

Same author

Dynamic changes in cortical neurotrophic factor-positive interneurons during sleep.

Scientific reports·2025

Same author

Sleep need driven oscillation of glutamate synaptic phenotype.

eLife·2025

Same author

Sleep Phylogeny: Have We Jumped the Shark?

Sleep medicine clinics·2025

Same author

A global transcriptional atlas of the effect of acute sleep deprivation in the mouse frontal cortex.

iScience·2024

Search research articles

Related Experiment Video

Updated: Jun 8, 2026

Quantifying Infra-slow Dynamics of Spectral Power and Heart Rate in Sleeping Mice

Quantifying Infra-slow Dynamics of Spectral Power and Heart Rate in Sleeping Mice

Published on: August 2, 2017

Slow wave activity during sleep: functional and therapeutic implications.

Robert W Greene¹, Marcos G Frank

¹Department of Psychiatry, UTSW Medical Center, Dallas VA, Dallas, Texas 75390, USA. robertw.greene@utsouthwestern.edu

The Neuroscientist : a Review Journal Bringing Neurobiology, Neurology and Psychiatry

|October 6, 2010

Summary

Electroencephalographic slow-wave activity (EEG SWA) reflects neocortical function during sleep. This review explores the neural mechanisms and functions of EEG SWA, a key marker of sleep need.

More Related Videos

Optogenetic Manipulation of Neural Circuits During Monitoring Sleep/wakefulness States in Mice

Optogenetic Manipulation of Neural Circuits During Monitoring Sleep/wakefulness States in Mice

Published on: June 19, 2019

A Chronic Sleep Fragmentation Model using Vibrating Orbital Rotor to Induce Cognitive Deficit and Anxiety-Like Behavior in Young Wild-Type Mice

A Chronic Sleep Fragmentation Model using Vibrating Orbital Rotor to Induce Cognitive Deficit and Anxiety-Like Behavior in Young Wild-Type Mice

Published on: September 22, 2020

Related Experiment Videos

Last Updated: Jun 8, 2026

Quantifying Infra-slow Dynamics of Spectral Power and Heart Rate in Sleeping Mice

Quantifying Infra-slow Dynamics of Spectral Power and Heart Rate in Sleeping Mice

Published on: August 2, 2017

Optogenetic Manipulation of Neural Circuits During Monitoring Sleep/wakefulness States in Mice

Optogenetic Manipulation of Neural Circuits During Monitoring Sleep/wakefulness States in Mice

Published on: June 19, 2019

A Chronic Sleep Fragmentation Model using Vibrating Orbital Rotor to Induce Cognitive Deficit and Anxiety-Like Behavior in Young Wild-Type Mice

A Chronic Sleep Fragmentation Model using Vibrating Orbital Rotor to Induce Cognitive Deficit and Anxiety-Like Behavior in Young Wild-Type Mice

Published on: September 22, 2020

Area of Science:

Neuroscience
Sleep Science
Electrophysiology

Background:

Electroencephalographic slow-wave activity (EEG SWA) signifies synchronized neocortical oscillations (0.5-4.0 Hz).
EEG SWA is prominent during non-REM sleep and increases with prior wakefulness.
While mechanisms are partly known, EEG SWA's relation to sleep homeostasis and brain functions remains unclear.

Purpose of the Study:

To review current understanding of neural mechanisms generating EEG SWA.
To discuss potential functions of EEG SWA in the brain.
To clarify the relationship between EEG SWA, sleep need, and homeostasis.

Main Methods:

Literature review of electrophysiological and neurobiological studies.
Analysis of cellular and network mechanisms underlying EEG SWA.
Synthesis of data on EEG SWA's role in sleep regulation.

Main Results:

Identified key cellular and network processes contributing to EEG SWA generation.
Highlighted EEG SWA's role as an indicator of sleep pressure.
Discussed unresolved questions regarding its precise functions and homeostatic regulation.

Conclusions:

EEG SWA is a critical indicator of sleep need and brain function.
Further research is needed to fully elucidate the roles and regulation of EEG SWA.
Understanding EEG SWA mechanisms is crucial for sleep science.