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Related Concept Videos

REM Sleep Behavior Disorder01:15

REM Sleep Behavior Disorder

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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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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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Dementia01:30

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Dementia is a collective term for cognitive disorders primarily affecting memory, thinking, and reasoning. It is not a specific disease but a syndrome, with Alzheimer's disease being the most common cause, accounting for approximately 60-80% of cases. Other types include vascular dementia, Lewy body dementia, and frontotemporal dementia. Dementia affects millions worldwide, particularly older adults, though it is not a normal part of aging.
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Somnambulism, commonly known as sleepwalking, involves individuals engaging in activities ranging from simple walking to more complex behaviors such as driving. Sleepwalking typically occurs during the slow-wave sleep stages 3 and 4 early in the night when the person is not dreaming, contradicting the myth that sleepwalkers are acting out their dreams.
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Sleep Apnea

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Sleep apnea is a condition where breathing stops intermittently during sleep, often leading to significant health issues. Each episode can last from 10 to 20 seconds or more and is frequently accompanied by a brief arousal from sleep. This disturbance, largely unnoticed by the individual, can lead to severe daytime fatigue. Commonly, individuals seek help after being informed by their partners about loud snoring and noticeable breathing pauses during sleep.
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Related Experiment Video

Updated: Sep 8, 2025

A Chronic Sleep Fragmentation Model using Vibrating Orbital Rotor to Induce Cognitive Deficit and Anxiety-Like Behavior in Young Wild-Type Mice
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Dementia with Lewy Bodies and Sleep Dysfunction.

Jakub Radziwon1, Jarosław Sławek1

  • 1Department of Neurology and Stroke, St. Adalbert Hospital, Gdańsk, Poland; Division of Neurological and Psychiatric Nursing, Faculty of Health Sciences, Medical University of Gdańsk, Dębinki 7, 80-211 Gdańsk, Poland.

Sleep Medicine Clinics
|September 5, 2025
PubMed
Summary

Dementia with Lewy bodies disrupts sleep networks, causing common issues like REM sleep behavior disorder and hypersomnia. Further research is needed to confirm the effectiveness and safety of available treatments for these sleep disturbances.

Keywords:
Dementia with Lewy bodiesHypersomniaParkinson’s disease dementiaRapid eye movement sleep behavior disorderSleep deprivationSleep wake disorders

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Area of Science:

  • Neurology
  • Sleep Medicine
  • Neurodegenerative Diseases

Background:

  • Dementia with Lewy bodies (DLB) is characterized by neurodegeneration impacting brain networks.
  • Sleep disturbances are a core feature of DLB, significantly affecting patient quality of life.

Purpose of the Study:

  • To review the spectrum of sleep disturbances in dementia with Lewy bodies.
  • To discuss current and potential therapeutic strategies for managing sleep issues in DLB patients.

Main Methods:

  • Literature review of studies on sleep disorders in dementia with Lewy bodies.
  • Analysis of the pathophysiology linking neurodegeneration to sleep disruption in DLB.

Main Results:

  • Rapid eye movement (REM) sleep behavior disorder and hypersomnia are highly prevalent in DLB.
  • Insomnia, sleep-disordered breathing, nocturnal movement disorders, and urinary dysfunction are also common.

Conclusions:

  • Sleep disturbances are a hallmark of dementia with Lewy bodies, stemming from widespread neurodegeneration.
  • While treatments exist, more clinical trials are essential to establish optimal efficacy and safety for DLB patients.