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Related Concept Videos

Insomnia01:27

Insomnia

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...
Management of Insomnia01:19

Management of Insomnia

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...
Substance Use Disorders Affecting Sleep01:24

Substance Use Disorders Affecting Sleep

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.
Understanding the concepts of physical dependence,...
Insufficient Sleep and Sleep Deprivation01:13

Insufficient Sleep and Sleep Deprivation

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.
Sleep deprivation is a more severe form of sleep loss...
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.
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:

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Related Experiment Video

Updated: Jun 20, 2026

Association Between Sleep Quality and Cognitive Symptoms in Patients with Major Depressive Disorder
04:33

Association Between Sleep Quality and Cognitive Symptoms in Patients with Major Depressive Disorder

Published on: April 26, 2024

Association between report of insomnia and daytime functioning.

Yuriy Ustinov1, Kenneth L Lichstein, Gregory S Vander Wal

  • 1The University of Alabama, Tuscaloosa, AL 35487-0348, USA. yustinov@bama.ua.edu

Sleep Medicine
|September 29, 2009
PubMed
Summary

Reports of insomnia significantly impact daytime functioning, even after accounting for other health and demographic factors. This highlights the importance of perceived sleep quality in overall well-being and daily performance.

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Area of Science:

  • Sleep Science
  • Psychology
  • Public Health

Background:

  • Insomnia is a prevalent sleep disorder affecting millions globally.
  • Understanding the impact of insomnia on daily life is crucial for effective treatment.

Purpose of the Study:

  • To investigate the relationship between self-reported insomnia and objective measures of daytime functioning.
  • To determine if insomnia reports predict daytime functioning beyond demographic, health, and sleep diary variables.

Main Methods:

  • Hierarchical regression analysis was used.
  • Data from 734 community volunteers (235 with insomnia, 499 without) were analyzed.
  • Daytime functioning was assessed using multiple validated questionnaires.

Main Results:

  • Reports of insomnia significantly predicted all five measures of daytime functioning.
  • Insomnia reports uniquely explained variance in daytime functioning, independent of covariates.
  • Age, pain, mental health issues, sleep onset latency (SOL), and wake after sleep onset (WASO) were significant predictors.

Conclusions:

  • Perceived sleep quality, specifically insomnia, is a strong determinant of daytime functioning.
  • These effects persist even when controlling for demographic, health, and objective sleep data.
  • Findings underscore the need to address subjective sleep experiences in clinical insomnia management.