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Related Concept Videos

Insufficient Sleep and Sleep Deprivation01:13

Insufficient Sleep and Sleep Deprivation

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Insufficient sleep refers to not getting the recommended amount of sleep for optimal functioning, even if it's just slightly less than needed. Sleep insufficiency may occur due to lifestyle choices, such as staying up late for social events or work, resulting in routinely getting less sleep than required. For example, consistently sleeping 6 hours when the body needs 7-9 hours can lead to cumulative effects on health and well-being.
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Substance Use Disorders Affecting Sleep01:24

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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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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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Insomnia01:27

Insomnia

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Insomnia is a prevalent sleep disorder characterized by difficulty falling asleep, frequent awakenings during the night, and waking up too early without being able to return to sleep. People with insomnia often experience these disruptions at least three nights a week for at least one month. Chronic insomnia, which lasts for at least three months, can lead to increased anxiety, which in turn can worsen sleep difficulties, creating a cycle of sleeplessness and stress.
Multiple factors contribute...
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Sedatives and Hypnotics Drugs: Miscellaneous Agents01:17

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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.
Melatonin congeners like ramelteon (Rozerem) and tasimelteon (Hetlioz) selectively bind to melatonin receptors (MT1 and MT2) and thus mimic the actions of melatonin, a hormone that regulates sleep-wake cycles. Tasimelteon is primarily used for non-24-hour sleep-wake disorder, common in blind patients. They are also used to treat conditions like insomnia...
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Sleep-Wake Cycles01:24

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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
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Updated: Jun 15, 2025

Polygraphic Recording Procedure for Measuring Sleep in Mice
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Coffee and sleep: Benefits and risks.

Yavar Bagheri Davisaraei1, Sepide Nateghi1, Hamed Rashidipour2

  • 1Research Center of Physiology, Semnan University of Medical Sciences, Semnan, Iran; Department of Physiology, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran.

Progress in Brain Research
|August 21, 2024
PubMed
Summary
This summary is machine-generated.

Consuming caffeine, found in coffee, can disrupt sleep by affecting sleep onset, deep sleep, and REM sleep. Limiting caffeine intake, especially in the evening, is recommended for better sleep quality.

Keywords:
AdenosineCoffeeSleep behaviorsSleep deprivation, sleepinessSleep disruptionSleep qualitySleep quantityStimulant

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Area of Science:

  • Neuroscience
  • Sleep Science
  • Pharmacology

Background:

  • Coffee is a popular beverage containing caffeine, a stimulant known to affect the central nervous system.
  • Caffeine consumption, particularly close to bedtime, is frequently associated with sleep disturbances.

Purpose of the Study:

  • To elucidate the mechanisms by which caffeine impacts sleep architecture.
  • To provide recommendations for mitigating caffeine's negative effects on sleep.

Main Methods:

  • Review of existing literature on caffeine's physiological effects.
  • Analysis of caffeine's impact on sleep parameters such as onset, duration, and stages (deep sleep, REM sleep).

Main Results:

  • Caffeine consumption delays sleep onset, reduces deep sleep, and disrupts overall sleep patterns.
  • Individual sensitivity, metabolism, and age significantly influence caffeine's effects on sleep.

Conclusions:

  • Reducing afternoon and evening caffeine intake, especially before bed, can improve sleep quality.
  • Mindful consumption, considering timing and individual factors, allows for coffee enjoyment while preserving healthy sleep patterns.