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Related Concept Videos

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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...
Understanding Sleep01:11

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.
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NREM Sleep
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Related Experiment Video

Updated: Jun 3, 2026

Optogenetic Manipulation of Neural Circuits During Monitoring Sleep/wakefulness States in Mice
08:58

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

Published on: June 19, 2019

Serotonin control of sleep-wake behavior.

Jaime M Monti1

  • 1Department of Pharmacology and Therapeutics, School of Medicine Clinics Hospital, Montevideo 11600, Uruguay. jmonti@mednet.org.uy

Sleep Medicine Reviews
|April 5, 2011
PubMed
Summary

Serotonin (5-HT) primarily promotes wakefulness but can influence sleep. Targeting 5-HT2A receptors with antagonists or inverse agonists increases slow-wave sleep (SWS) and reduces REM sleep, offering potential insomnia treatments.

Area of Science:

  • Neuroscience
  • Pharmacology
  • Sleep Medicine

Background:

  • Serotonin (5-HT) is recognized for promoting wakefulness and inhibiting REM sleep.
  • However, 5-HT also plays a complex role, sometimes increasing sleep propensity.
  • The dorsal raphe nucleus (DRN) is a primary source of serotonergic innervation to key brain regions involved in sleep-wake regulation.

Purpose of the Study:

  • To investigate the multifaceted role of serotonin (5-HT) in regulating sleep-wake states.
  • To explore the specific effects of various 5-HT receptor subtypes on sleep architecture.
  • To evaluate the therapeutic potential of targeting 5-HT receptors for insomnia treatment.

Main Methods:

  • Electrophysiological, neurochemical, genetic, and neuropharmacological approaches were employed.

More Related Videos

Polygraphic Recording Procedure for Measuring Sleep in Mice
08:45

Polygraphic Recording Procedure for Measuring Sleep in Mice

Published on: January 25, 2016

Related Experiment Videos

Last Updated: Jun 3, 2026

Optogenetic Manipulation of Neural Circuits During Monitoring Sleep/wakefulness States in Mice
08:58

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

Published on: June 19, 2019

Polygraphic Recording Procedure for Measuring Sleep in Mice
08:45

Polygraphic Recording Procedure for Measuring Sleep in Mice

Published on: January 25, 2016

  • Studies utilized knockout mice lacking specific 5-HT receptor subtypes (e.g., 5-HT1A, 5-HT1B, 5-HT2A, 5-HT2C, 5-HT7).
  • Administration of selective agonists and antagonists/inverse agonists for various 5-HT receptors in rodents and humans.

    • Main Results:

    • Activation of 5-HT1A and 5-HT1B receptors generally inhibits REM sleep, while 5-HT2A/2C and 5-HT7 receptor activation promotes wakefulness.
    • Knockout of 5-HT1A/1B receptors increased REM sleep; knockout of 5-HT2A/2C receptors increased wakefulness and reduced SWS.
    • Administration of 5-HT2A/2C antagonists/inverse agonists significantly increased SWS and decreased REMS in rodents and humans, including those with insomnia.

    Conclusions:

    • Serotonin's role in sleep is complex, with different receptor subtypes mediating distinct effects.
    • Targeting 5-HT2A receptors with antagonists or inverse agonists demonstrates a clear potential for enhancing SWS.
    • Combining 5-HT2A antagonists/inverse agonists with hypnotics may offer a novel strategy for normalizing sleep architecture in insomnia patients.