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Related Concept Videos

Sleep-Wake Cycles01:24

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 Sleep01:22

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...
Sleepwalking and Sleep Talking01:17

Sleepwalking and Sleep Talking

Somnambulism, commonly known as sleepwalking, involves individuals engaging in activities ranging from simple walking to more complex behaviors such as driving. Sleepwalking typically occurs during the slow-wave sleep stages 3 and 4 early in the night when the person is not dreaming, contradicting the myth that sleepwalkers are acting out their dreams.
Factors that increase the likelihood of sleepwalking include sleep deprivation and alcohol consumption. Contrary to common beliefs, it is safe...
REM Sleep Behavior Disorder01:15

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...
Sleep Apnea01:21

Sleep Apnea

Sleep apnea is a condition where breathing stops intermittently during sleep, often leading to significant health issues. Each episode can last from 10 to 20 seconds or more and is frequently accompanied by a brief arousal from sleep. This disturbance, largely unnoticed by the individual, can lead to severe daytime fatigue. Commonly, individuals seek help after being informed by their partners about loud snoring and noticeable breathing pauses during sleep.
The condition is more prevalent among...
Narcolepsy01:07

Narcolepsy

Narcolepsy is a chronic sleep disorder characterized by pervasive, uncontrolled sleepiness and other sleep disturbances. One of its hallmark symptoms is an abrupt transition to REM sleep upon falling asleep, which causes symptoms typically associated with this phase to occur unexpectedly during wakefulness. These include the following symptoms, which typically last from a minute or two to half an hour.

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Autonomic function in sleep apnea patients: increased heart rate variability except during REM sleep in obese patients.

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Sleep dysfunction in patients with gastro-oesophageal reflux disease: prevalence and response to GERD therapy, a pilot study.

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Eight weeks of non-nightly use of zolpidem for primary insomnia.

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Related Experiment Video

Updated: Jul 23, 2026

Drug-Induced Sleep Endoscopy (DISE) with Target Controlled Infusion (TCI) and Bispectral Analysis in Obstructive Sleep Apnea
07:54

Drug-Induced Sleep Endoscopy (DISE) with Target Controlled Infusion (TCI) and Bispectral Analysis in Obstructive Sleep Apnea

Published on: December 6, 2016

Update on nonapnea sleep disorders.

R Vorona1, J C Ware

  • 1Department of Medicine, Eastern Virginia Medical School, Sleep Disorders Center, Sentara Norfolk General Hospital, Norfolk 23507-1999, USA. voronard@evms.edu

Current Opinion in Pulmonary Medicine
|December 2, 2000
PubMed
Summary

Recent advances in nonapneic sleep disorders offer new insights and treatments for narcolepsy, restless legs syndrome (RLS), and insomnia. Improved understanding of circadian rhythms and sleep mechanisms is enhancing patient care.

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Acupoint Application Combined with Ear Plaster Therapy for Treating Sleep Disorders with Acute Exacerbation of Chronic Obstructive Pulmonary Disease
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Last Updated: Jul 23, 2026

Drug-Induced Sleep Endoscopy (DISE) with Target Controlled Infusion (TCI) and Bispectral Analysis in Obstructive Sleep Apnea
07:54

Drug-Induced Sleep Endoscopy (DISE) with Target Controlled Infusion (TCI) and Bispectral Analysis in Obstructive Sleep Apnea

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A Chronic Sleep Fragmentation Model using Vibrating Orbital Rotor to Induce Cognitive Deficit and Anxiety-Like Behavior in Young Wild-Type Mice
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Acupoint Application Combined with Ear Plaster Therapy for Treating Sleep Disorders with Acute Exacerbation of Chronic Obstructive Pulmonary Disease
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Area of Science:

  • Sleep Medicine
  • Neurology
  • Pulmonology

Background:

  • Obstructive sleep apnea receives significant research focus.
  • Nonapneic sleep disorders are increasingly recognized for their clinical importance.
  • Pulmonary physicians benefit from broader knowledge of sleep medicine.

Purpose of the Study:

  • To review recent advancements in nonapneic sleep disorders.
  • To highlight new understandings in narcolepsy, restless legs syndrome (RLS), and insomnia.
  • To discuss the implications of improved circadian rhythm physiology for sleep specialists.

Main Methods:

  • Review of recent scientific breakthroughs and clinical developments.
  • Synthesis of information on narcolepsy pathogenesis.
  • Analysis of new therapeutic options for RLS and insomnia.
  • Discussion of advances in understanding circadian rhythm physiology.

Main Results:

  • Breakthroughs in narcolepsy pathogenesis are paving the way for novel treatments.
  • An expanding range of medications is available for managing restless legs syndrome (RLS).
  • New pharmacologic options for insomnia provide greater treatment flexibility.
  • Enhanced understanding of circadian rhythms and sleep mechanisms is emerging.

Conclusions:

  • Significant progress has been made in understanding and treating nonapneic sleep disorders.
  • New research offers promising therapeutic avenues for narcolepsy, RLS, and insomnia.
  • Advances in basic science are improving the management of sleep conditions.