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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:
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.
Nightmares and Night Terrors01:18

Nightmares and Night Terrors

Nightmares and night terrors represent two distinct types of sleep disturbances that differ in timing, characteristics, and the sleeper's recall of the event. Nightmares are vivid, disturbing dreams that usually awaken the sleeper from REM sleep, a stage of sleep where brain activity is high, and dreams are most frequent. Upon awakening, individuals often have detailed recollections of their nightmares, which can include themes of threats to survival, security, or self-esteem.
Nightmares often...

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Related Experiment Video

Updated: Jul 12, 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

Sleep disorders: sleep apnea and narcolepsy.

A Kales, A Vela-Bueno, J D Kales

    Annals of Internal Medicine
    |March 1, 1987
    PubMed
    Summary

    Obstructive sleep apnea and narcolepsy are serious sleep disorders. Obstructive sleep apnea involves breathing cessation during sleep, while narcolepsy causes disabling daytime sleepiness and cataplexy.

    Area of Science:

    • Neurology
    • Sleep Medicine
    • Cardiology

    Background:

    • Obstructive sleep apnea (OSA) is a life-threatening disorder characterized by excessive daytime sleepiness, nocturnal breathing cessation, and snorting.
    • OSA symptoms typically appear before age 40 and are common in obese, hypertensive men, often leading to cardiovascular issues.
    • Narcolepsy is a lifelong, disabling condition with early onset, often misdiagnosed for years, presenting with sleep attacks and cataplexy.

    Purpose of the Study:

    • To differentiate between obstructive sleep apnea and narcolepsy.
    • To outline diagnostic criteria and effective treatments for both sleep disorders.

    Main Methods:

    • Clinical information review for obstructive sleep apnea suspicion.
    • Sleep laboratory evaluation for diagnosis.

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    High-Throughput Small Molecule Drug Screening For Age-Related Sleep Disorders Using Drosophila melanogaster
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    High-Throughput Small Molecule Drug Screening For Age-Related Sleep Disorders Using Drosophila melanogaster

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    Related Experiment Videos

    Last Updated: Jul 12, 2026

    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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  • Assessment of symptoms like sleep attacks, cataplexy, daytime sleepiness, and nocturnal breathing cessation.
  • Main Results:

    • Obstructive sleep apnea diagnosis is indicated by clinical suspicion and confirmed via sleep studies.
    • Severe obstructive sleep apnea is effectively treated with tracheostomy.
    • Narcolepsy diagnosis relies on sleep attacks combined with cataplexy.

    Conclusions:

    • Effective treatments for obstructive sleep apnea include tracheostomy for severe cases.
    • Narcolepsy management involves stimulants and naps for sleep attacks, and tricyclic drugs for cataplexy.