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Sedatives and hypnotics encompass a wide range of substances, each with its unique mechanism of action, uses, and potential adverse effects.
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Management of Insomnia01:19

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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...
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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.
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Chemotherapy-Induced Nausea and Vomiting: Cannabinoids01:21

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Tetrahydrocannabinol (THC) is a phytocannabinoid that primarily interacts with the CB1 receptor, a type of G protein-coupled receptor (GPCR) predominantly in and around the chemoreceptor trigger zone (CTZ) and emetic center. THC also blocks the serotonin receptor activity in the dorsal vagal complex (DVC) by inhibiting serotonin release. THC exerts its anti-emetic effects through these interactions, which are beneficial for patients undergoing chemotherapy.
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Sleep-Wake Cycles01:24

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Related Experiment Video

Updated: Nov 18, 2025

Optogenetic Manipulation of Neural Circuits During Monitoring Sleep/wakefulness States in Mice
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Cannabinoids and Sleep/Wake Control.

Mónica Méndez-Díaz1, Alejandra E Ruiz-Contreras2, Jacqueline Cortés-Morelos3

  • 1Laboratorio de Cannabinoides, Departamento de Fisiología, Facultad de Medicina, UNAM, Ciudad de México, Mexico.

Advances in Experimental Medicine and Biology
|February 4, 2021
PubMed
Summary
This summary is machine-generated.

The endocannabinoid system, including oleamide, anandamide, and 2-arachidonylglycerol, plays a crucial role in regulating sleep-wake cycles. This system promotes both NREM and REM sleep, offering potential therapeutic targets for sleep disorders like insomnia.

Keywords:
2-arachidonylglycerolAnadamideCannabinoid receptor 1InsomniaNon-rapid-eye-movement (NREM) sleepOleamideRapid-eye-movement (REM) sleep

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Area of Science:

  • Neuroscience
  • Sleep Medicine
  • Endocrinology

Background:

  • The sleep-wake cycle involves distinct phases: wake (W), non-rapid-eye-movement (NREM), and rapid-eye-movement (REM) sleep.
  • Specialized brain structures and neurotransmitters (e.g., orexin, GABA, acetylcholine) regulate these phases.
  • The endocannabinoid system, identified decades ago, has emerging evidence supporting its role in sleep regulation.

Purpose of the Study:

  • To elucidate the role of the endocannabinoid system in regulating the sleep-wake cycle.
  • To highlight the sleep-promoting properties of endocannabinoids like oleamide.
  • To establish the endocannabinoid system as a potential therapeutic target for sleep disorders.

Main Methods:

  • Review of existing scientific literature on the endocannabinoid system and sleep.
  • Analysis of studies investigating the effects of endocannabinoids on sleep architecture.
  • Examination of the involvement of cannabinoid receptors (CB1R) in sleep regulation.

Main Results:

  • Endocannabinoids, including oleamide, anandamide, and 2-arachidonylglycerol, have demonstrated sleep-promoting properties.
  • These endocannabinoids influence both NREM and REM sleep phases.
  • Activation of the CB1 receptor is implicated in the sleep effects of endocannabinoids.

Conclusions:

  • The endocannabinoid system is a significant regulator of the sleep-wake cycle.
  • Endocannabinoids modulate NREM and REM sleep, suggesting their involvement in maintaining sleep homeostasis.
  • Targeting the endocannabinoid system, particularly via CB1R, presents a promising avenue for developing novel treatments for insomnia and other sleep disorders.