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Related Concept Videos

Understanding Sleep01:11

Understanding Sleep

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Sleep, an essential biological state, involves significant reductions in physical activity, sensory awareness, and interaction with the environment. This complex physiological process is primarily regulated by specific brain regions, notably the hypothalamus and pons, which govern the sleep-wake cycle or circadian rhythm.
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REM Sleep Behavior Disorder01:15

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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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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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Stages of Sleep01:22

Stages of Sleep

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Sleep progresses through distinct stages, each characterized by specific brain wave patterns and physiological responses ranging from wakefulness to stages of non-rapid eye movement, known as non-REM, to rapid eye movement, referred to as REM. Understanding these stages helps in recognizing how sleep supports various bodily and cognitive functions.
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The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent...
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Updated: Aug 30, 2025

Chronic Sleep Deprivation in Mouse Pups by Means of Gentle Handling
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Shank3 influences mammalian sleep development.

Elizabeth Medina1, Hannah Schoch1, Kaitlyn Ford1

  • 1Department of Translational Medicine and Physiology, Sleep and Performance Research Center, Elson S. Floyd College of Medicine, Washington State University, Spokane, Washington, USA.

Journal of Neuroscience Research
|September 3, 2022
PubMed
Summary
This summary is machine-generated.

Sleep problems in autism spectrum disorder (ASD) may stem from abnormal sleep development. Shank3 mutant mice show reduced sleep and impaired sleep regulation, suggesting early life sleep issues are key in ASD.

Keywords:
EEGREMShank3autism spectrum disorderdevelopmentmouse modelsleepsleep latency

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Genetics

Background:

  • Sleep problems are common in autism spectrum disorder (ASD) and may precede diagnosis.
  • Sleep abnormalities might be a core feature of ASD, but their developmental course is unclear.
  • The Shank3 gene is a high-confidence ASD gene, and its mutation (Shank3∆C) in mice models clinical sleep phenotypes.

Purpose of the Study:

  • To investigate the developmental trajectory of sleep changes in a Shank3 mutant mouse model of ASD.
  • To characterize longitudinal sleep patterns from weaning to young adulthood.
  • To explore the impact of sleep pressure on sleep regulation during development in this model.

Main Methods:

  • Longitudinal electro-encephalographic (EEG) recordings in Shank3∆C mice and controls.
  • Analysis of sleep parameters including total sleep time, REM, and NREM sleep.
  • Assessment of sleep latency and response to sleep deprivation across different developmental stages.

Main Results:

  • Shank3∆C male mice exhibit reduced overall sleep throughout life.
  • Early life shows increased REM sleep and reduced NREM sleep in mutants.
  • Mutant mice display abnormal responses to sleep pressure, failing to reduce sleep latency after prolonged waking, independent of NREM sleep dynamics.

Conclusions:

  • Reduced sleep and abnormal sleep regulation are present early in development in this ASD mouse model.
  • Impaired ability to adjust sleep latency suggests developmental abnormalities in sleep-wake and arousal mechanisms in ASD.
  • Findings support sleep disturbances as a core feature of ASD, with potential implications for early intervention.