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Insufficient Sleep and Sleep Deprivation01:13

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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 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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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.
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Related Experiment Video

Updated: Jul 19, 2025

Author Spotlight: Unveiling the Connection Between Sleep Disorders and Cognitive Symptoms in Depression
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Relation between sleep disorders and post-stroke cognitive impairment.

Yajing Zhang1, Xiaoshuang Xia2, Ting Zhang1

  • 1Department of Neurology, Tianjin Huanhu Hospital, Tianjin, China.

Frontiers in Aging Neuroscience
|August 7, 2023
PubMed
Summary
This summary is machine-generated.

Sleep duration extremes (less than 7 or more than 8 hours) significantly increase the risk of cognitive impairment after stroke. Poor sleep quality and daytime sleepiness also contribute to long-term cognitive decline in stroke survivors.

Keywords:
OSAnocturnal total sleep timepost-stroke cognitive impairmentsleep disorderssleepiness

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Area of Science:

  • Neurology
  • Sleep Medicine
  • Cognitive Science

Background:

  • Post-stroke cognitive impairment (PSCI) is a common and serious complication.
  • Sleep disorders are increasingly recognized as potential contributors to neurological conditions.
  • Understanding the relationship between sleep and cognitive function post-stroke is crucial for developing effective interventions.

Purpose of the Study:

  • To investigate the impact of sleep disorders on cognitive impairment following a stroke.
  • To identify specific sleep-related factors that influence the development and progression of post-stroke cognitive impairment.

Main Methods:

  • A cohort of 1,542 first-ever stroke patients was assessed.
  • Evaluated sleep parameters (e.g., total sleep time, sleep quality, sleepiness) and cognitive function using standardized scales (MMSE, MoCA, PSQI, ESS).
  • Followed patients for up to 4 years to track cognitive changes and their correlation with sleep patterns.

Main Results:

  • Both excessively long (>8 hours) and short (<7 hours) nocturnal sleep duration were identified as risk factors for cognitive impairment at 3, 6 months, and 4 years post-stroke.
  • Poor sleep quality and increased daytime sleepiness emerged as significant risk factors for cognitive impairment at the 4-year follow-up.
  • The prevalence of cognitive impairment was high, noted in 79.3% at admission and decreasing to 52.2% at 4 years.

Conclusions:

  • Abnormal nocturnal sleep duration is a consistent risk factor for cognitive impairment after stroke.
  • Impaired sleep quality and sleepiness are associated with long-term cognitive deficits in stroke survivors.
  • Cognitive impairment is highly prevalent in patients following a transient ischemic attack (TIA).